2021 TRANSMISSION

Automatic Transmission - 9T45 (M3F) - Repair Instructions - On Vehicle - Trailblazer

REPAIR INSTRUCTIONS - ON VEHICLE

TRANSMISSION SERVICE FAST LEARN PROCEDURE
Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System
Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

Description

The learn procedure performs a series of individual clutch applications which allows the control module K71 to
learn initial clutch apply pressures. The control module uses the learn values for clutch control and timing of
shifts.
When to Perform the Procedure

NOTE: Failure to perform this procedure may result in poor system performance,
DTCs being set, or customer dissatisfaction.

This procedure is required when the following component has been repaired, replaced, removed, or serviced:

K71 Transmission Control Module

T12 Automatic Transmission Assembly
Any condition/repair related to the following: Shift Quality
Calibration Update or Software Update
Clutch Assembly or Torque Converter Assembly

Reference Information

Scan Tool Reference

Control Module References

With Scan Tool

WARNING: After releasing the parking brake, be sure the vehicle will not roll forward or
backwards when removing the wheel blocks. If the vehicle is not in gear, the
vehicle may move possibly causing personal injury.

NOTE: The Transmission Service Fast Learn procedure can also be performed through
the Service Programming System (SPS) where the Transmission Fluid
Temperature threshold may be displayed.

1. Perform the following steps:

1. Vehicle - Outside
2. Parking Brake - Applied
3. Drive Wheels - Blocked
2. Engine - Idling - At normal operating temperature.
3. Transmission Range - P
4. Select: Module Diagnostics
 5. Select: Transmission Control Module
6. Select: Configuration/Reset Functions
7. Select: Transmission Service Fast Learn
8. Verify the scan tool parameter is not available: Transmission Fluid Temperature
If the scan tool parameter is available
1. Engine - Idling
2. Observe the scan tool parameter:
Transmission Fluid Temperature = Transmission Temperature is Above Operating
Temperature - Perform the following procedure/test: Procedure 1 & Repeat step 8
Transmission Fluid Temperature = Transmission Temperature is Below Operating
Temperature - Perform the following procedure/test: Procedure 2 & Repeat step 8
Go to next step: If the scan tool parameter is not available
9. Follow the instructions on the scan tool.

Verify the scan tool procedure was successful.

If the procedure was not successful

Refer to Step 1

Go to next step: If the procedure was successful

10. All OK.

Procedure 1

1. Ignition/Vehicle - Off - For greater than 10 min

2. Engine - Idling - For 10 s

Procedure 2

WARNING: When performing a brake torque procedure, the vehicle must be parked
outdoors away from any buildings, people, or other vehicles. Failure to
follow these precautions may result in severe vehicle damage, and/or
serious bodily injury.

1. Brake Pedal - Apply & Hold

2. Transmission Range - D
3. Engine Speed - 1.2k to 1.5k RPM - For 5 s
4. Engine - Idling - For 10 s
5. Transmission Range - P
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

TRANSMISSION CONTROL LEVER KNOB REPLACEMENT

Removal Procedure

1. Turn the ignition switch to the On position, engine Off.

2. Apply the parking brake.
3. Place the transmission control in the Neutral position.
4. Turn the ignition switch to the Off position.
5.

Using a trim tool, release the retainers (arrows) from the front floor console.

6. Release the rear locating tab (1) from the front floor console.
7. Pull the transmission control lever boot bezel up to gain access to the electrical connector.

8.

Electrical Connector (1) - Disconnect

9.

Pull the transmission control lever boot bezel (1) up to gain access to the transmission control lever boot
retaining ring (2).
 10. Release (arrows) the 2 latches of the transmission control lever boot retaining ring to separate the
transmission control lever boot from the transmission control lever knob.
11. Push the transmission control lever boot bezel along with the retaining ring down to gain access to the
transmission control lever knob fastener.

12.

Using a trim tool, release the 2 retainers (arrows) of the knob cover (1) to remove the transmission
control lever knob fastener (2) and pull the bottom of the knob cover slightly.

13. Transmission Control Lever Knob Fastener (2) - Remove

14.

Transmission Control Lever Knob (1) @ Transmission Control Lever (3) - Remove

15. Transmission Control Lever Boot (2) @ Transmission Control Lever - Remove

Installation Procedure
1.

Transmission Control Lever Boot (2) @ Transmission Control Lever (3) - Install

2. Transmission Control Lever Knob (1) @ Transmission Control Lever - Install

3.

NOTE: Ensure the correct orientation of the transmission control lever knob
fastener.

Transmission Control Lever Knob Fastener (2) - Install

4. Install the transmission control lever knob cover (1).

5. Check the transmission control lever knob for proper seat by pulling and twisting.
 6.

Pull the transmission control lever boot bezel (1) along with the transmission control lever boot retaining
ring (2) up.

7. Install the transmission control lever boot retaining ring to the transmission control lever knob. The 2
latches (arrows) of the transmission control lever boot retaining ring must engage noticeable.
8. Push the transmission control lever boot bezel down.

9.

Electrical Connector (1) - Connect

10.

Insert the rear locating tab (1) into the front floor console.
 11. Seat the retainers (arrows) of the bezel into the front floor console.
12. Turn the ignition switch to On position, engine Off.
13. Place transmission control in the Park position.
14. Un-apply the parking brake.
15. Turn the ignition switch to the Off position.

TRANSMISSION CONTROL MODULE REPLACEMENT

Callout Component Name

Preliminary Procedures

1. Remove the left front tire and wheel assembly. Tire and Wheel Removal and Installation
2. Front Wheelhouse Liner - Left Side - Remove - Front Wheelhouse Liner Replacement

Transmission Control Module

Procedure

1 1. Disconnect the electrical connector.

2. Remove the transmission control module from the module bracket by releasing the
retaining tabs.
3. Program the transmission control module. Control Module References

TRANSMISSION CONTROL MODULE BRACKET REPLACEMENT

 Callout Component Name
Preliminary Procedure
Transmission Control Module Replacement
Transmission Control Module Bracket Nut [2x]

CAUTION:
Fastener
Caution

Procedure

NOTE:
The body to
1 front wiring
harness
connector
needs to be
removed to
remove and
install the
bracket nut.

Electrical Connector - Disconnect

Tighten
9 N.m (80 lb in)
2 Transmission Control Module Bracket

TRANSMISSION CONTROL REPLACEMENT (WITH BASE)

 Callout Component Name
Preliminary Procedures

1. Remove the front floor console. Front Floor Console Replacement .

WARNING:
After
installing the
transmission
range
selector shift
cable, pull
up and push
down on
ALL
connections
to verify that
the
connections
are fully
seated and
properly
engaged.
Failure to
perform this
task can
result in the
vehicle not
being able to
shift into
PARK
causing
potential
vehicle
damage and
bodily injury.

2. Disconnect the automatic transmission range selector lever cable from transmission control.
Automatic Transmission Range Selector Lever Cable Replacement.
3. Disconnect the electrical connector.
 Callout Component Name
Transmission Control Bolt [4x]

CAUTION:
Fastener
1 Caution

Tighten
9 N.m (80 lb in)
Transmission Control
Procedure
2
After installing the range selector lever cable, perform a range selector lever cable
adjustment. Range Selector Lever Cable Adjustment

TRANSMISSION CONTROL REPLACEMENT (WITHOUT BASE)

Removal Procedure

1. Set the park brake.

2. Front Floor Console - Remove - Front Floor Console Replacement
3. Automatic Transmission Range Selector Lever Cable @ Transmission Control - Disconnect - Automatic
Transmission Range Selector Lever Cable Replacement
4. Disconnect the transmission control electrical connector.

5.

Remove the main shaft bolt nut and washer (1) from the transmission control assembly.
 6.

Remove the main shaft bolt (1).

7.

Pull the transmission control assembly (1) rearward and upward to unseat it from the transmission control
base.

8. Remove the transmission control assembly from the vehicle.

Installation Procedure

1. Position the transmission control assembly to the transmission control base.

2.

Push the transmission control assembly (1) downward and forward to seat it to the transmission control
base.

3.

NOTE: Ensure the flats of the bolt align with the transmission control assembly
flat points inside the base before tightening the nut.

Install the main shaft bolt (1).

 4.

CAUTION: Fastener Caution .

NOTE: When installing the transmission control main shaft bolt, the face of the
bolt must be held in the slot of the mounting bracket as the nut is torqued
to ensure it remains seated and doesn't rotate out of the slot. Failure to
perform this task can result in a loose shifter feel, squeaks & rattles, or
excessive cross car lash resulting in a customer's poor perceived quality
of the system.

Install the main shaft bolt nut and washer (1) to the transmission control assembly and tighten to 7 N.m
(62 lb in).

5. Connect the transmission control electrical connector.

6. Automatic Transmission Range Selector Lever Cable @ Transmission Control - Connect - Automatic
Transmission Range Selector Lever Cable Replacement
7. Front Floor Console - Install - Front Floor Console Replacement
8. Release the park brake.
9. Range Selector Lever Cable - Adjust - Range Selector Lever Cable Adjustment

AUTOMATIC TRANSMISSION CONTROL INDICATOR REPLACEMENT

 Callout Component Name
Preliminary Procedure
Front Floor Console Cup Holder Trim Plate Replacement
Automatic Transmission Control Indicator Housing Bolt

CAUTION:
Fastener
1 Caution

Tighten
1.2 N.m (11 lb in)
2 Automatic Transmission Control Indicator

AUTOMATIC TRANSMISSION RANGE SELECTOR LEVER CABLE BRACKET REPLACEMENT

Callout Component Name

Preliminary Procedure
Remove the automatic transmission range selector lever cable from the range selector lever cable lever
and the range selector lever cable bracket. Automatic Transmission Range Selector Lever Cable
Replacement
1 Transmission Range Selector Lever Cable Bracket Bolt [2x]

CAUTION:
 Callout Component Name
Fastener
Caution

Tighten
22 N.m (16 lb ft)
Transmission Range Selector Lever Cable Bracket
Procedure
2
After installing the range selector lever cable, perform a range selector lever cable
adjustment. Range Selector Lever Cable Adjustment

AUTOMATIC TRANSMISSION RANGE SELECTOR LEVER CABLE REPLACEMENT

Removal Procedure

1. Set the park brake and chock the wheels.

2. Air Cleaner Assembly - Remove - Air Cleaner Assembly Replacement

3.

Automatic Transmission Range Selector Lever Cable Bolt (1) - Remove

4. Slide the retainer lock (2) forward to expose the cable adjustment retainer (3).
5. Using a suitable tool, raise the cable adjustment retainer (3) to the unlock position.
6. Remove the range selector lever cable (4) from the range selector lever cable lever and the range selector
lever cable bracket.
7. Front Floor Console - Remove - Front Floor Console Replacement
 8.

Transmission Range Selector Lever Cable Grommet Nut (1) - Remove [2x]

9.

Remove the range selector lever cable bolt (1) from the transmission control.

NOTE: The cable bolt (2) is not separated from the range selector lever cable.

10. Remove the range selector lever cable bolt (2) along with the range selector lever cable (3) from the
transmission control.
11. Remove the range selector lever cable from vehicle by pulling it into the interior.
Installation Procedure

1. Prepare the range selector lever cable bolt (2) for installation as follows:
1. Remove any loose cured adhesive from the external threads of the component using a lint free
cloth.
2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured
adhesive.
3. Apply thread locking adhesive to the external threads of the component.
4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
2. Install the range selector lever cable to vehicle by installing it from the interior.
3.

Range Selector Lever Cable (3) @ Transmission Control - Install

CAUTION: Fastener Caution

4. Install the 2 range selector lever cable bolts (1, 2) and tighten to 9 N.m (80 lb in).

5.

Transmission Range Selector Lever Cable Grommet Nut (1) - Install and tighten [2x] 9 N.m (80 lb in)

6. Front Floor Console - Install - Front Floor Console Replacement

7.
 Install the range selector lever cable (4) to the range selector lever cable lever.
8. Automatic Transmission Range Selector Lever Cable Bolt (1) - Install and tighten 9 N.m (80 lb in)
9. Depress the cable adjustment retainer (3) locking the retainer completely.
10. Slide the retainer lock (2) rearward to cover the cable adjustment retainer (3).
11. Range Selector Lever Cable - Adjust - Range Selector Lever Cable Adjustment
12. Air Cleaner Assembly - Install - Air Cleaner Assembly Replacement

AUTOMATIC TRANSMISSION RANGE SELECTOR LEVER CABLE LEVER REPLACEMENT

Callout Component Name

Preliminary Procedures

1. Air Cleaner Assembly Replacement

2. Remove the automatic transmission range selector lever cable from the range selector lever cable
lever and the range selector lever cable bracket. Automatic Transmission Range Selector Lever
Cable Replacement

1 Automatic Transmission Range Selector Lever Nut

WARNING:
Hold the
transmission
range
selector
lever while
removing or
installing the
lever
retaining
nut. Failure
to hold the
lever can
cause
damage to
the
transmission
internal park
system
components
 Callout Component Name
which could
allow the
vehicle to
roll when
placed in the
park
position.

CAUTION:
Fastener
Caution

Tighten
30 N.m (22 lb ft)
Automatic Transmission Range Selector Lever Cable Lever
Procedure
2
After installing the range selector lever cable, perform a range selector lever cable
adjustment. Range Selector Lever Cable Adjustment

RANGE SELECTOR LEVER CABLE ADJUSTMENT

1. Set the park brake and chock the wheels.

2. Air Cleaner Assembly - Remove - Air Cleaner Assembly Replacement

3.

Slide the retainer lock (1) forward to expose the cable adjustment retainer (2).

4. Using a suitable tool, raise the cable adjustment retainer (2) to the unlock position.
5. Verify that the range selector lever cable lever is in position "P" by turning the range selector lever cable
lever counterclockwise.
 6.

Verify that the transmission control lever (1) is in position "P".

7.

Depress the cable adjustment retainer (2) locking the retainer completely.

8. Slide the retainer lock (1) rearward to cover the cable adjustment retainer (2).
9. Air Cleaner Assembly - Install - Air Cleaner Assembly Replacement
10. Check the transmission range select lever in all gear selections for proper operation.

AUTOMATIC TRANSMISSION FLUID PRESSURE TEST HOLE PLUG REPLACEMENT

 Callout Component Name
Preliminary Procedure
Remove the left front tire and wheel assembly. Tire and Wheel Removal and Installation
Automatic Transmission Fluid Pressure Test Hole Plug

CAUTION:
Component
Fastener
1 Tightening
Caution

Tighten
12 N.m (106 lb in)

TRANSMISSION FLUID FILLER CAP REPLACEMENT

Callout Component Name

Preliminary Procedure
Air Cleaner Assembly Replacement
1 Transmission Fluid Filler Cap

TRANSMISSION FLUID FILLER TUBE PLUG REPLACEMENT

Fig. 1: Identifying Automatic Transmission Fluid Filler Tube Plug
Courtesy of GENERAL MOTORS COMPANY

Callout Component Name

Preliminary Procedure
Raise and Support the vehicle. Lifting and Jacking the Vehicle
1 Transmission Fluid Filler Tube Plug

AUTOMATIC TRANSMISSION FLUID PAN DRAIN PLUG REPLACEMENT

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Front Compartment Insulator - Remove - Front Compartment Insulator Replacement (Base)
 3.
Fig. 2: Identifying Automatic Transmission Fluid Pan Drain Plug
Courtesy of GENERAL MOTORS COMPANY

Automatic Transmission Fluid Pan Drain Plug (1) - Remove

4. Drain the transmission fluid into a suitable container.

CAUTION: Component Fastener Tightening Caution

5. Automatic Transmission Fluid Pan Drain Plug (1) - Install and tighten 12 N.m (106 lb in)
Installation Procedure

1.

Lower the vehicle.

NOTE: If the transmission fluid filler cap cannot be accessed, proceed to Step 3
in this procedure.

2. Remove the fluid fill cap (1), if accessible.

3. Remove the left front wheel and tire assembly. Tire and Wheel Removal and Installation

4.
Fig. 3: Identifying Automatic Transmission Fluid Filler Plug
Courtesy of GENERAL MOTORS COMPANY

Transmission Fluid Filler Plug (1) @ Transmission - Remove

5. Fill the transmission to the proper level with the correct fluid. Transmission Fluid Level and Condition
Check , and Adhesives, Fluids, Lubricants, and Sealers .

6.

NOTE: If the transmission fluid filler cap cannot be accessed, proceed to step 7
in this procedure.

Install the fluid fill cap (1), if accessible.

 7.
Fig. 4: Identifying Automatic Transmission Fluid Filler Plug
Courtesy of GENERAL MOTORS COMPANY

CAUTION: Component Fastener Tightening Caution

Transmission Fluid Filler Plug (1) @ Transmission - Install and tighten 40 N.m (30 lb ft)
8. Front Compartment Insulator - Install - Front Compartment Insulator Replacement (Base)
9. Install the left front wheel and tire assembly. Tire and Wheel Removal and Installation

AUTOMATIC TRANSMISSION FLUID LEVEL HOLE PLUG REPLACEMENT

Fig. 5: Identifying Automatic Transmission Fluid Level Hole Plug
Courtesy of GENERAL MOTORS COMPANY

Callout Component Name

Preliminary Procedure
Remove the left front tire and wheel assembly. Tire and Wheel Removal and Installation
Automatic Transmission Fluid Level Hole Plug

CAUTION:
Component
Fastener
1 Tightening
Caution

Tighten
12 N.m (106 lb in)

AUTOMATIC TRANSMISSION CASE HOLE PLUG REPLACEMENT (CASE HOLE PLUG)

Fig. 6: Identifying Automatic Transmission Case Hole Plug

Courtesy of GENERAL MOTORS COMPANY

Callout Component Name

Preliminary Procedure
Remove the left front tire and wheel assembly. Tire and Wheel Removal and Installation
1 Automatic Transmission Case Hole Plug

CAUTION:
Component
Fastener
Tightening
Caution
 Callout Component Name

Tighten
12 N.m (106 lb in)

AUTOMATIC TRANSMISSION CASE HOLE PLUG REPLACEMENT (AUXILIARY FLUID FILL

PLUG)

Fig. 7: Identifying Automatic Transmission Auxiliary Fluid Fill Plug

Courtesy of GENERAL MOTORS COMPANY

Callout Component Name

Preliminary Procedure
Remove the left front tire and wheel assembly. Tire and Wheel Removal and Installation
Automatic Transmission Auxiliary Fluid Fill Plug

CAUTION:
Component
Fastener
1 Tightening
Caution .

Tighten
40 N.m (30 lb ft)

MANUAL SHIFT DETENT LEVER SHAFT REPLACEMENT

 Callout Component Name
Preliminary Procedures

1. Automatic Transmission Range Selector Lever Cable Lever Replacement

2. Control Valve Body Replacement

Manual Shaft Detent Lever Hub Pin

CAUTION:
Fastener
Caution

Procedure
Install the manual shaft detent lever hub pin to correct height.
1
NOTE:
Install a
NEW manual
shaft detent
lever hub
pin.

Specification
7.9 mm (0.38 in) (a)
Manual Shaft

NOTE:
Lubricate
the shaft
2 with ATF to
prevent
damage to
the manual
shift shaft
seal during
installation.
3 Manual Shaft Detent Lever Assembly
 Callout Component Name
4 Park Pawl Actuator

MANUAL SHIFT SHAFT SEAL REPLACEMENT

Special Tools

DT-45201 Cooler Line Seal Remover

DT-49101 Seal Installer

Equivalent regional tools: Special Tools

Removal Procedure

1. Remove the manual shift detent lever shaft assembly. Manual Shift Detent Lever Shaft Replacement

2.

Remove and DISCARD the manual shaft seal (1) using DT-45201 remover (2).

Installation Procedure
 1.

Install a NEW manual shaft seal (1) using DT-49101 seal installer (2).

2. Install the manual shift detent lever shaft assembly. Manual Shift Detent Lever Shaft Replacement

FRONT WHEEL DRIVE SHAFT SEAL REPLACEMENT - LEFT SIDE

Callout Component Name

Preliminary Procedure
Front Wheel Drive Half Shaft Replacement - Left Side
1 Front Wheel Drive Shaft Oil Seal

Procedure

1. For seal removal use GE-6125-1B slide hammer with DT-23129 universal seal
remover.
2. For seal installation use GE-8092 driver handle with DT-47790 seal installer.

Special Tools
 Callout Component Name
DT-23129 Universal seal Remover
DT-47790 Seal Installer
GE-6125-1B Slide Hammer
GE-8092 Driver Handle

Equivalent regional tools: Special Tools

FRONT WHEEL DRIVE SHAFT SEAL REPLACEMENT - RIGHT SIDE

For right front wheel drive shaft seal replacement, refer to Power Transfer Unit Cover to Intermediate Drive
Shaft Seal Replacement .

CONTROL VALVE BODY COVER REPLACEMENT

Removal Procedure

1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
2. Drain the transmission fluid. Transmission Fluid Drain and Fill

3.

Radiator Assembly (1) - Remove - Radiator Replacement

4.

Charge Air Cooler Inlet Air Hose (1) - Remove - Charge Air Cooler Inlet Air Hose Replacement
5.

Disconnect the control valve body transmission control module electrical connector (1), then unclip the 8
wiring harness retainers (2).

6. Automatic Transmission Input Speed Sensor Electrical Connector (3) - Disconnect

7. position the battery positive cable and wiring harness out of the way.

8.

Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (1) - Remove - Automatic
Transmission Fluid Cooling Heat Exchanger Inlet Pipe Replacement (M3F)

9. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) - Remove - Automatic
Transmission Fluid Cooling Heat Exchanger Outlet Pipe Replacement (M3F)
10.

Transmission Wiring Harness Bracket Nut (1) - Remove [3x]

11. Transmission Wiring Harness Bracket (2, 3, 4) - Remove [3x]

12. Transmission Fluid Cooler Pipe Bracket Nut (5) - Remove
13. Transmission Fluid Cooler Pipe Bracket (6) - Remove

14.
Fig. 8: Identifying Control Valve Body Cover Bolts With Loosening Sequence
Courtesy of GENERAL MOTORS COMPANY
 Control Valve Body Cover Bolt (1, 2) - Remove [12x]

15.

Control Valve Body Cover (1) - Remove

16. Control Valve Body Cover Gasket (2) - Remove

17. Body Side Wiring Harness Opening Seal (3) - Remove and DISCARD
18. Clean the transmission case and control valve body cover gasket surfaces. Inspect and replace the gasket
as necessary.

Installation Procedure

1.

Body Side Wiring Harness Opening Seal (3) - Install NEW

2. Control Valve Body Cover Gasket (2) - Install

3. Control Valve Body Cover (1) - Install
4.
Fig. 9: Identifying Control Valve Body Cover Bolts With Tightening Sequence
Courtesy of GENERAL MOTORS COMPANY

NOTE: The number (1) bolts are stud bolts.

Control Valve Body Cover Bolt (1, 2) - Install [12x] - Hand tighten

CAUTION: Fastener Caution

NOTE: Install all control valve body cover bolts and stud bolts by hand then
torque all bolts in sequence.

5. Control Valve Body Cover Bolt (1, 2) - Tighten in sequence [12x] 11 N.m (97 lb in)
 6.

Transmission Fluid Cooler Pipe Bracket (6) - Install

7. Transmission Fluid Cooler Pipe Bracket Nut (5) - Install and tighten 9 N.m (80 lb in)
8. Transmission Wiring Harness Bracket (2, 3, 4) - Install [3x]
9. Transmission Wiring Harness Bracket Nut (1) - Install and tighten [3x] 9 N.m (80 lb in)

10.

Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (1) - Install - Automatic
Transmission Fluid Cooling Heat Exchanger Inlet Pipe Replacement (M3F)

11. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) - Install - Automatic
Transmission Fluid Cooling Heat Exchanger Outlet Pipe Replacement (M3F)
12. Install the battery positive cable and wiring harness to the front of the transmission.
13.

Automatic Transmission Input Speed Sensor Electrical Connector (3) - Connect

14. Connect the control valve body transmission control module electrical connector (1), then clip the 8
wiring harness retainers (2).

15.

Charge Air Cooler Inlet Air Hose (1) - Install - Charge Air Cooler Inlet Air Hose Replacement

16.

Radiator Assembly (1) - Install - Radiator Replacement

 17. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
18. Fill the transmission with transmission fluid. Transmission Fluid Drain and Fill
19. Check for leaks.

CONTROL VALVE BODY REPLACEMENT

Removal Procedure

1. Control Valve Body Cover @ Transmission - Remove - Control Valve Body Cover Replacement

2.

Remove the control valve body (1) from the transmission. Control Valve Body Assembly Removal

Installation Procedure

1.
 Install the control valve body (1) to the transmission. Control Valve Body Assembly Installation
2. Control Valve Body Cover @ Transmission - Install - Control Valve Body Cover Replacement
3. Perform the solenoid valve characterization programming procedure. Q77 Transmission Control
Solenoid Valve Characterization Programming (9T45)

CONTROL VALVE SOLENOID BODY REPLACEMENT

Removal Procedure

1. Control Valve Body Cover @ Transmission - Remove - Control Valve Body Cover Replacement

2.

Remove the control valve solenoid body (1) from the transmission. Control Valve Body Assembly
Removal
Installation Procedure
 1.

Install the control valve solenoid body (1) to the transmission. Control Valve Body Assembly
Installation

2. Control Valve Body Cover @ Transmission - Install - Control Valve Body Cover Replacement
3. Perform the solenoid valve characterization programming procedure. Q77 Transmission Control
Solenoid Valve Characterization Programming (9T45)

AUTOMATIC TRANSMISSION INPUT SPEED SENSOR REPLACEMENT

Callout Component Name

Preliminary Procedure
Front Wheelhouse Liner - Left Side - Remove - Front Wheelhouse Liner Replacement
1 Input Speed Sensor Bolt

CAUTION:
Fastener
Caution
 Callout Component Name

Tighten
9 N.m (80 lb in)
Input Speed Sensor

Procedure
2 1. Disconnect the electrical connector.
2. Perform the transmission service fast learn procedure. Transmission Service Fast
Learn Procedure.

AUTOMATIC TRANSMISSION OUTPUT SPEED SENSOR REPLACEMENT

Callout Component Name

Preliminary Procedure
Remove the control valve body. Control Valve Body Replacement
Output Speed Sensor Bolt

CAUTION:
Fastener
1 Caution .

Tighten
9 N.m (80 lb in)
Output Speed Sensor
Procedure
2
Perform the transmission service fast learn procedure. Transmission Service Fast Learn
Procedure.

TRANSMISSION MOUNT REPLACEMENT

Removal Procedure

1. Battery Tray @ Vehicle - Remove - Battery Tray Replacement

2. Install the engine support fixture. Engine Support Fixture
 3.

Transmission Mount Transmission Side Bolt (1) - Remove and DISCARD [3x]

4.

Transmission Mount Bolt (1) - Remove [2x]

5. Transmission Mount (2) - Remove

Installation Procedure
1.

Transmission Mount (2) - Install

CAUTION: Fastener Caution

2. Transmission Mount Bolt (1) - Install and tighten [2x] 100 N.m (74 lb ft)

3.

CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners.

Install a NEW torque-to-yield or single use fastener when installing this
component. Failure to replace the torque-to-yield or single use fastener
could cause damage to the vehicle or component.

Transmission Mount Transmission Side Bolt (1) - Install NEW and tighten [3x]
 1. First Pass: 100 N.m (74 lb ft)
2. Final Pass: 60 - 75 degrees
4. Remove the engine support fixture. Engine Support Fixture
5. Battery Tray @ Vehicle - Install - Battery Tray Replacement

TRANSMISSION MOUNT TRANSMISSION-SIDE BRACKET REPLACEMENT

Removal Procedure

1. Engine Mount Brace @ Vehicle - Remove - Engine Mount Brace Replacement (RH) , or Engine
Mount Brace Replacement (LH, AWD) , or Engine Mount Brace Replacement (Rear)
2. Transmission Mount @ Vehicle - Remove - Transmission Mount Replacement

3.

Transmission Mount Bracket Bolt (1) - Remove and DISCARD [3x]

4. Transmission Mount Bracket (2) - Remove

Installation Procedure
 1.

Transmission Mount Bracket (2) - Install

CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners.

Install a NEW torque-to-yield or single use fastener when installing this
component. Failure to replace the torque-to-yield or single use fastener
could cause damage to the vehicle or component.

CAUTION: Fastener Caution

2. Transmission Mount Bracket Bolt (1) - Install NEW and tighten [3x]
1. First Pass: 100 N.m (74 lb ft)
2. Final Pass: 60 - 75 degrees
3. Transmission Mount @ Vehicle - Install - Transmission Mount Replacement
4. Engine Mount Brace @ Vehicle - Install - Engine Mount Brace Replacement (RH) , or Engine Mount
Brace Replacement (LH, AWD) , or Engine Mount Brace Replacement (Rear)

TRANSMISSION MOUNT STRUT REPLACEMENT

Removal Procedure
 1.

Drivetrain and Front Suspension Cradle (1) - Remove - Drivetrain and Front Suspension Cradle
Removal and Installation (AWD)

2.

Transmission Mount Strut Bolt-Body Side (1) @ Drivetrain and Front Suspension Cradle - Remove and
DISCARD

3. Transmission Mount Strut (2) @ Drivetrain and Front Suspension Cradle - Remove

Installation Procedure
 1.

Transmission Mount Strut (2) @ Drivetrain and Front Suspension Cradle - Install

CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners.

Install a NEW torque-to-yield or single use fastener when installing this
component. Failure to replace the torque-to-yield or single use fastener
could cause damage to the vehicle or component.

CAUTION: Fastener Caution

2. Transmission Mount Strut Bolt-Body Side (1) @ Drivetrain and Front Suspension Cradle - Install NEW
and tighten
1. First Pass: 100 N.m (74 lb ft)
2. Final Pass: 60 - 75 degrees

3.

Drivetrain and Front Suspension Cradle (1) - Install - Drivetrain and Front Suspension Cradle
Removal and Installation (AWD)

FLUID TRANSFER PIPE REPLACEMENT

Removal Procedure

1. Control Valve Body Cover @ Transmission - Remove - Control Valve Body Cover Replacement

2.

Remove the fluid transfer pipe (1) from the transmission. Control Valve Body Assembly Removal

Installation Procedure

1.

Install the fluid transfer pipe (1) to the transmission. Control Valve Body Assembly Installation

2. Control Valve Body Cover @ Transmission - Install - Control Valve Body Cover Replacement

TORQUE CONVERTER REPLACEMENT

 Callout Component Name
Preliminary Procedures

1. Transmission Replacement
2. Position the transmission assembly so the torque converter is facing up.

1 Torque Converter Assembly

CAUTION:
Only install
the lift assist
handles until
it stops. Do
not tighten.
Over
tightening
the lift assist
handles can
cause
damage to
the torque
converter.

CAUTION:
Lower the
torque
converter
straight
down.
Failure to
lower the
torque
converter
straight
down could
damage the
torque
converter
clutch lip
seal inside
 Callout Component Name
the torque
converter
clutch
assembly.

CAUTION:
Failure to
raise the
torque
dampener
assembly
straight up
could
damage the
torque
dampener
clutch lip
seal inside
the torque
dampener
clutch
assembly.

Special Tools
DT-46409 Torque Converter Lifting Handles
Equivalent regional tools: Special Tools

TORQUE CONVERTER FLUID SEAL REPLACEMENT

Callout Component Name

Preliminary Procedure
Torque Converter Replacement
1 Torque Converter Fluid Seal

NOTE:
Install a
NEW seal.
Do NOT
 Callout Component Name
reuse the old
seal.

Special Tools

DT-6125-1B Slide Hammer

J-29162 Seal Installer
EN-23129 Universal Seal Remover

Equivalent regional tools: Special Tools

AUTOMATIC TRANSMISSION WIRING HARNESS REPLACEMENT

Removal Procedure

1. Control Valve Body Cover @ Transmission - Remove - Control Valve Body Cover Replacement

2.

Remove the automatic transmission wiring harness (1) from the transmission. Control Valve Body
Assembly Removal
Installation Procedure
 1.

Install the automatic transmission wiring harness (1) to the transmission. Control Valve Body Assembly
Installation

2. Control Valve Body Cover @ Transmission - Install - Control Valve Body Cover Replacement

AUXILIARY FLUID ACCUMULATOR REPLACEMENT

Removal Procedure

1. Remove the battery tray. Battery Tray Replacement

2.
Fig. 10: Exploded View Of Auxiliary Fluid Accumulator Components
Courtesy of GENERAL MOTORS COMPANY
 WARNING: The automatic transmission fluid accumulator may be pressurized greater
than 120 psi (827 kPa) and fluid may be hot. When servicing accumulator,
key must be OFF for a minimum of 10 minutes. Do not open bleeder screw
until instructed to do so or personal injury may result.

Remove the auxiliary fluid accumulator (2) from the transmission. Auxiliary Fluid Accumulator
Removal

Installation Procedure

1.
Fig. 11: Exploded View Of Auxiliary Fluid Accumulator Components
Courtesy of GENERAL MOTORS COMPANY

Install the auxiliary fluid accumulator (6) to the transmission. Auxiliary Fluid Accumulator
Installation

2. Install the battery tray. Battery Tray Replacement

TRANSMISSION FLUID DRAIN AND FILL

Removal Procedure

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Front Compartment Insulator - Remove - Front Compartment Insulator Replacement (Base)
 3.
Fig. 12: Identifying Automatic Transmission Fluid Pan Drain Plug
Courtesy of GENERAL MOTORS COMPANY

Automatic Transmission Fluid Pan Drain Plug (1) - Remove

4. Drain the transmission fluid into a suitable container.

CAUTION: Component Fastener Tightening Caution

5. Automatic Transmission Fluid Pan Drain Plug (1) - Install and tighten 12 N.m (106 lb in)
Installation Procedure

1. Lower the vehicle.

2. Remove the left front wheel and tire assembly. Tire and Wheel Removal and Installation
3.
Fig. 13: Identifying Automatic Transmission Fluid Filler Plug
Courtesy of GENERAL MOTORS COMPANY

Transmission Fluid Filler Plug (1) @ Transmission - Remove

4. Fill the transmission to the proper level with the correct fluid. Transmission Fluid Level and Condition
Check , and Adhesives, Fluids, Lubricants, and Sealers .

5.
Fig. 14: Identifying Automatic Transmission Fluid Filler Plug
Courtesy of GENERAL MOTORS COMPANY
 CAUTION: Component Fastener Tightening Caution

Transmission Fluid Filler Plug (1) @ Transmission - Install and tighten 40 N.m (30 lb ft)
6. Front Compartment Insulator - Install - Front Compartment Insulator Replacement (Base)
7. Install the left front wheel and tire assembly. Tire and Wheel Removal and Installation

TRANSMISSION REPLACEMENT
Removal Procedure

1. Transmission Fluid - Drain - Transmission Fluid Drain and Fill

2. After removing the related parts for the powertrain assembly removal, remove the powertrain assembly
from the vehicle. Engine Replacement

3.

Wiring Harness Retainer (1) - Unclip

4. Disconnect the auxiliary fluid accumulator electrical connector (2).

5.

Disconnect the control valve body transmission control module electrical connector (1), then unclip the 4
wiring harness retainers (2).

6. Automatic Transmission Input Speed Sensor Electrical Connector (3) - Disconnect

7. Position the battery positive cable and wiring harness out of the way.
 8.

Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Nut (1) - Remove

9. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (2) @ Automatic Transmission Fluid
Cooling Exchanger - Remove
10. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Seal (3) - Remove and DISCARD

11.

Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Bolt (1) - Remove

12. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Fitting Retainer (2) @ Transmission
Fluid Cooler Pipe Connector - Remove
13. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (3) @ Transmission Fluid Cooler Pipe
Connector - Remove
14. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (3) @ Transmission Fluid Cooler Pipe
Clip (4) - Remove
15. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (3) @ Transmission - Remove
16.

Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Nut (1) - Remove

17. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) @ Automatic Transmission Fluid
Cooling Exchanger - Remove
18. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Seal (3) - Remove and DISCARD

19.

Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Nut (1) - Remove

20. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) @ Transmission - Remove
21. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Seal (3) - Remove and DISCARD
22. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Tie Strap (4) @ Transmission -
Remove and DISCARD
23. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) @ Transmission Fluid Cooler
Pipe Clip (5) - Remove
24.

Transmission Wiring Harness Bracket Nut (1) - Remove [3x]

25. Transmission Wiring Harness Bracket (2, 3, 4) - Remove [3x]

26. Transmission Fluid Cooler Pipe Bracket Nut (5) - Remove
27. Transmission Fluid Cooler Pipe Bracket (6) - Remove

28.

Automatic Transmission Fluid Cooling Exchanger Bolt (1) - Remove [3x]

29. Automatic Transmission Fluid Cooling Exchanger (2) - Remove

30.
 Heater Outlet Pipe (1) - Remove - Heater Outlet Pipe Replacement

31.

Transmission Bolt (1) - Remove [2x]

32. Starter - Remove - Starter Replacement (L3T)

33. Mark the relationship of the flywheel to the torque converter for reassembly.

34.

Torque Converter Bolt (1) - Remove and DISCARD [3x]

35.

Transmission Bolt (1) - Remove [3x]

 36.

Transmission Bolt (1) - Remove [2x]

NOTE: Ensure the torque converter remains securely in place on the

transmission input shaft while separating and removing the transmission.

37. Separate the transmission from the engine.

38. Transfer components as necessary.

Installation Procedure

1. Install the transmission to the engine.

2.

CAUTION: Fastener Caution

Transmission Bolt (1) - Install and tighten [2x] 58 N.m (43 lb ft)
3.

Transmission Bolt (1) - Install and tighten [3x] 58 N.m (43 lb ft)

4. Align the mark on the flex plate to the mark on the torque converter for reassembly.

5.

Torque Converter Bolt (1) - Install NEW and tighten [3x] 60 N.m (44 lb ft)

6. Starter - Install - Starter Replacement (L3T)

7.

Transmission Bolt (1) - Install and tighten [2x] 58 N.m (43 lb ft)
 8.

Heater Outlet Pipe (1) - Install - Heater Outlet Pipe Replacement

9.

Automatic Transmission Fluid Cooling Exchanger (2) - Install

10. Automatic Transmission Fluid Cooling Exchanger Bolt (1) - Install and tighten [3x] 9 N.m (80 lb in)

11.

Transmission Fluid Cooler Pipe Bracket (6) - Install

12. Transmission Fluid Cooler Pipe Bracket Nut (5) - Install and tighten 9 N.m (80 lb in)
13. Transmission Wiring Harness Bracket (2, 3, 4) - Install [3x]
14. Transmission Wiring Harness Bracket Nut (1) - Install and tighten [3x] 9 N.m (80 lb in)

15.

Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) @ Transmission Fluid Cooler
Pipe Clip (5) - Install

16. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Tie Strap (4) @ Transmission -
Install NEW
17. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Seal (3) - Install NEW
18. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) @ Transmission - Install
19. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Nut (1) - Install and tighten 22 N.m
(16 lb ft)

20.

Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Seal (3) - Install NEW

21. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe (2) @ Automatic Transmission Fluid
Cooling Exchanger - Install
22. Automatic Transmission Fluid Cooling Heat Exchanger Outlet Pipe Nut (1) - Install and tighten 22 N.m
(16 lb ft)
23.

Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Fitting Retainer (2) @ Transmission
Fluid Cooler Pipe Connector - Install

24. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (3) @ Transmission Fluid Cooler Pipe
Connector - Install
25. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (3) @ Transmission Fluid Cooler Pipe
Clip (4) - Install
26. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Bolt (1) - Install and tighten 9 N.m (80
lb in)

27.

Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Seal (3) - Install NEW

28. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe (2) @ Automatic Transmission Fluid
Cooling Exchanger - Install
29. Automatic Transmission Fluid Cooling Heat Exchanger Inlet Pipe Nut (1) - Install and tighten 22 N.m
(16 lb ft)
 30.

Automatic Transmission Input Speed Sensor Electrical Connector (3) - Connect

31. Connect the control valve body transmission control module electrical connector (1), then clip the 4
wiring harness retainers (2).

32.

Connect the auxiliary fluid accumulator electrical connector (2).

33. Wiring Harness Retainer (1) - Clip

34. Install the powertrain assembly to the vehicle and then install the related parts. Engine Replacement
35. Range Selector Lever Cable - Adjust - Range Selector Lever Cable Adjustment
36. Transmission Fluid - Fill - Transmission Fluid Drain and Fill
37. After repairs, refer to Control Module References for programming and set up procedures.
38. Perform the solenoid valve characterization programming procedure. Q77 Transmission Control
Solenoid Valve Characterization Programming (9T45)
39. Road test the vehicle.

TRANSMISSION BRACE REPLACEMENT

Removal Procedure
 1.

Catalytic Converter Brace Bracket (2) - Remove - Catalytic Converter Brace Bracket Replacement
(L3T, AWD, Lower Bracket Right)

2.

Transmission Brace Bolt (1) - Remove [2x]

3. Transmission Brace Bolt (2) - Remove [2x]

4. Transmission Brace (3) - Remove

Installation Procedure

1.
 Transmission Brace (3) - Install

CAUTION: Fastener Caution

2. Transmission Brace Bolt (2) - Install and tighten [2x] 22 N.m (16 lb ft)
3. Transmission Brace Bolt (1) - Install and tighten [2x] 22 N.m (16 lb ft)

4.

Catalytic Converter Brace Bracket (2) - Install - Catalytic Converter Brace Bracket Replacement
(L3T, AWD, Lower Bracket Right)