8/2/23, 15:49 Document ID: 376073

2000 Chevrolet C Pickup - 2WD (1GBGC34RXYR223075) |

| Engine |
Escalade, Pickup Classic, Tahoe Classic, Yukon Denali VIN C/K Service Manual Engine Controls - 5.0L and 5.7L |
Component Locator | Document ID: 376073

VCM Connector End Views

Table 1: Vehicle Control Module (VCM) Connector C1
Table 2: Vehicle Control Module (VCM) Connector C2
Table 3: Vehicle Control Module (VCM) Connector C3
Table 4: Vehicle Control Module (VCM) Connector C4
Vehicle Control Module (VCM) Connector C1

Connector Part 12129025

Information 32 Pin VCM Connector C1 (BLU)

Wire Circuit
Pin Color No. Function

1-2 — — Not Used

3 BRN/WHT 633 1X CMP Sensor Signal

4-6 — — Not Used

7 TAN 1667 HO2S Bank 2 Sensor 1 Low

8 PNK/BLK 632 CMP Sensor Ground

9 PPL 30 Fuel Level Output

10 TAN/BLK 422 TCC Solenoid Control

11-12 — — Not Used

13 WHT 687 3-2 SS Valve Assembly Control

14 BRN 436 AIR Pump Relay Control

© 2023 General Motors.  All rights reserved.

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15 YEL/BLK 1827 Vehicle Speed Output

16-18 — — Not Used

19 PPL/WHT 1665 HO2S Bank 1 Sensor 1 High

HO2S Bank 2 Sensor 2 High without C6P (under 8600

20 PPL 1670 GVW)
HO2S Bank 1 Sensor 2 High with C6P (over 8600 GVW)

21 PPL 1666 HO2S Bank 2 Sensor 1 High

HO2S Bank 2 Sensor 2 High with C6P (over 8600 GVW)

22 PPL/WHT 1668 HO2S Bank 1 Sensor 2 High without C6P (under 8600
GVW)

23 — — Not Used

HO2S Bank 2 Sensor 2 Low without C6P (under 8600 GVW)

24 TAN 1671
HO2S Bank 1 Sensor 2 Low with C6P (over 8600 GVW)

25 TAN/WHT 1653 HO2S Bank 1 Sensor 1 Low

HO2S Bank 2 Sensor 2 Low with C6P (over 8600 GVW)

26 TAN/WHT 1669
HO2S Bank 1 Sensor 2 Low without C6P (under 8600 GVW)

27 — — Not Used

28 PPL 574 CKP Sensor Ground

29 LT/GRN/BLK 822 VSS Low

30 PPL/WHT 821 VSS High

31 YEL 573 4X CKP Sensor Signal

32 — — Not Used

Vehicle Control Module (VCM) Connector C2

© 2023 General Motors.  All rights reserved.

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8/2/23, 15:49 Document ID: 376073

Connector Part 12129025

Information 32 Pin VCM Connector C2 (RED)

Wire Circuit
Pin Color No. Function

1 — — Not Used

2 WHT 1310 EVAP Canister Vent Valve Control

3 — — Not Used

4 YEL/BLK 1223 2-3 SS Valve Control

5 — — Not Used

6 LT/GRN 1222 1-2 SS Valve Control

7 BRN 418 TCC PWM Solenoid Valve Control

8 BLK 1744 Fuel Injector #1 Driver

9 DK/BLU/WHT 878 Fuel Injector #8 Driver

10 BRN 1456 EGR Pintle Position Signal

11 LT/GRN/BLK 1745 Fuel Injector #2 Driver

12 RED/BLK 877 Fuel Injector #7 Driver

13 LT/GRN/WHT 1749 IAC Coil B High

14 LT/BLU/WHT 1747 IAC Coil A High

15 BLK/WHT 845 Fuel Injector #5 Driver

16 YEL/BLK 846 Fuel Injector #6 Driver

© 2023 General Motors.  All rights reserved.

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17-18 — — Not Used

19 DK/BLU 496 KS Input

20 — — Not Used

21 LT/GRN 432 MAP Sensor Signal

22 TAN 472 IAT Sensor Signal

23 YEL 410 ECT Sensor Signal

24 DK/BLU 417 TP Sensor Signal

25 DK/GRN 890 Fuel Tank Pressure Sensor Signal

26 — — Not Used

27 YEL/BLK 1227 TFT Sensor Signal (Automatic Transmission Only)

28 YEL 492 MAF Sensor Signal

29 LT/GRN/BLK 444 IAC Coil B Low

30 LT/BLU/BLK 1748 IAC Coil A Low

31 LT/BLU/BLK 844 Fuel Injector #4 Driver

32 PNK/BLK 1746 Fuel Injector #3 Driver

Vehicle Control Module (VCM) Connector C3

Connector Part 12129025

Information 32 Pin VCM Connector C3 (CLR)

Wire Circuit
Pin Color No. Function

© 2023 General Motors.  All rights reserved.

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1 DK/GRN/WHT 459 A/C Compressor Clutch Relay Control

2 DK/GRN/WHT 428 EVAP Canister Purge Valve Control

3 — — Not Used

4 BLK 452 Sensor Ground

5 — — Not Used

6 RED/BLK 1228 PC Solenoid Valve High

7 DK/BLU/WHT 1231 Transmission Input Speed Sensor Low (4L80E)

8 RED/BLK 1230 Transmission Input Speed Sensor High (4L80E)

9 WHT 423 IC Control

10 — — Not Used

11 RED 1226 Transmission Range C Input

12 GRY 416 5 Volt Reference

13 PPL/WHT 1589 Fuel Level Sensor Signal

14 DK/BLU 604 A/C Recirculation Signal

15 — — Not Used

16 LT/BLU/WHT 1229 PC Solenoid Valve Low (Automatic Transmission Only)

17 BLK/WHT 451 VCM Ground

18 BLK/WHT 451 VCM Ground

19 BLK 470 Sensor Ground

20 — — Not Used

21 ORN 440 Battery Positive Voltage (B+)

22 DK/BLU 1225 Transmission Range B Input

23 PNK 1224 Transmission Range A Input

24 — — Not Used

25 DK/GRN/WHT 762 A/C Request Signal

© 2023 General Motors.  All rights reserved.

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26 — — Not Used

27 GRY 474 5 Volt Reference

28-29 — — Not Used

30 DK/GRN 603 A/C Cycling Switch Signal

31-32 — — Not Used

Vehicle Control Module (VCM) Connector C4

Connector Part 12129225

Information 24 Pin VCM Connector C4 (BLK)

Wire Circuit
Pin Color No. Function

1 DK/GRN/WHT 465 Fuel Pump Relay Control

2 — — Not Used

3 DK/GRN/WHT 817 Vehicle Speed Output

4 DK/GRN 389 Vehicle Speed Output

5 BRN/WHT 419 MIL Control

6 — — Not Used

7 DK/GRN 1614 Recirculation Door Motor Control

8 — — Not Used

9 DK/BLU 473 Auxiliary Fan

10 PPL 420 Brake Switch Input

© 2023 General Motors.  All rights reserved.

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11 PPL 1807 Serial Data (Class 2)

12 BLK 900 Dual Fuel Module Return

13 BRN 441 Ignition Positive Voltage

14 — — Not Used

15 TAN/BLK 456 Shift Light (Manual Transmission)

16 RED 1676 EGR Valve Control

17 — — Not Used

18 PNK 439 Ignition Positive Voltage

19 BLK/WHT 1695 4WD Wheel Lock Input

20 WHT 257 EGR Valve Ground

21 — — Not Used

22 BRN/WHT 379 CPP Switch Signal (Manual Transmission)

23 GRY/BLK 1694 4WD Indicator Signal Input

24 LT/BLU/BLK 396 Cruise Engaged Input

© 2023 General Motors.  All rights reserved.

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