GM Service Manual Online
For 1990-2009 cars only
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


Object Number: 218792  Size: CF

Connector Part Information

32 Pin VCM Connector C1 (BLU)

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Used

3

BRN/WHT

633

1X Cam 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 Signal Output

10

TAN/BLK

422

TCC Solenoid Control

11-12

--

--

Not Used

13

WHT

687

3-2 Shift Solenoid Valve Assembly Control

14

--

--

Not Used

15

YEL/BLK

1827

Vehicle Speed Output

16-18

--

--

Not Used

19

PPL/WHT

1665

HO2S Bank 1 Sensor 1 Signal

20

PPL/WHT

1668

HO2S Bank 1 Sensor 3 Signal

21

PPL

1666

HO2S Bank 2 Sensor 1 Signal

22

PPL

1670

HO2S Bank 1 Sensor 2 Signal

23

--

--

Not Used

24

TAN/WHT

1669

HO2S Bank 1 Sensor 3 Low

25

TAN/WHT

1653

HO2S Bank 1 Sensor 1 Low

26

TAN

1671

HO2S Bank 1 Sensor 2 Low

27

--

--

Not Used

28

PPL

574

Crankshaft Position (CKP) Sensor Ground

29

LT GRN/BLK

822

Vehicle Speed Sensor (VSS) Low

30

PPL/WHT

821

Vehicle Speed Sensor (VSS) High

31

YEL

573

3X Crankshaft Position (CKP) Sensor Signal

32

--

--

Not Used

Vehicle Control Module (VCM) Connector C2


Object Number: 218792  Size: CF

Connector Part Information

32 Pin VCM Connector C2 (RED)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

WHT

1310

EVAP Vent Solenoid (Valve) Driver

3

--

--

Not Used

4

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

5

--

--

Not Used

6

LT GRN

1222

1-2 Shift Solenoid Valve Control

7

BRN

418

TCC PWM Solenoid Valve Control

8

BLK

1744

Fuel Injector #1 Driver

9

YEL/BLK

846

Fuel Injector #6 Driver

10

BRN

1456

EGR Valve Pintle Position Signal

11-12

--

--

Not Used

13

LT GRN/WHT

1749

IAC Coil B High

14

LT BLU/WHT

1747

IAC Coil A High

15

LT GRN/BLK

1745

Fuel Injector #2 Driver

16

PNK/BLK

1746

Fuel Injector #3 Driver

17-18

--

--

Not Used

19

DK BLU

496

KS Signal

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

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

BLK/WHT

845

Fuel Injector #5 Driver

32

LT BLU/BLK

844

Fuel Injector #4 Driver

Vehicle Control Module (VCM) Connector C3


Object Number: 218792  Size: CF

Connector Part Information

32 Pin VCM Connector C3 (CLR)

Pin

Wire Color

Circuit No.

Function

1

DK GRN/WHT

459

A/C Compressor Enable Relay Control

Empty without A/C

2

DK GRN/WHT

428

EVAP Canister Purge Solenoid (Valve) Driver

3

--

--

Not Used

4

BLK

452

Sensor Ground

5

--

--

Not Used

6

RED/BLK

1228

Pressure Control Solenoid (PCS) High

7

DK BLU/WHT

1231

Input Shaft Speed Sensor High (4L80E Only)

8

RED/BLK

1230

Input Shaft Speed Sensor Low (4L80E Only)

9

WHT

423

IC Control

10

--

--

Not Used

11

RED

1226

Trans Range C Input

12

GRY

416

5 Volt Reference

13

PPL

1589

Fuel Signal Input

14-15

--

--

Not Used

16

LT BLU WHT

1229

Pressure Control Solenoid (PCS) Low

17

TAN/WHT

551

VCM Ground

18

BLK/WHT

451

VCM Ground

19

BLK

470

Sensor Ground

20

--

--

Not Used

21

ORN

440

Battery Positive Voltage

22

DL BLU

1225

Trans Range B Input

23

PNK

1224

Trans Range A Input

24

--

--

Not Used

25

DK GRN/WHT

762

A/C Request Signal

Empty without A/C

26

--

--

Not Used

27

GRY

474

5 Volt Reference

28-29

--

--

Not Used

30

DK GRN

603

A/C Request Signal

Empty without A/C

31-32

--

--

Not Used

Vehicle Control Module (VCM) Connector C4


Object Number: 218795  Size: CF

Connector Part Information

24 Pin VCM Connector C4 (BLK)

Pin

Wire Color

Circuit No.

Function

1

DK GRN/WHT

465

Fuel Pump Relay Control

2

--

--

Not Used

3

DK GRN/WHT

817

Vehicle Speed Output (VSS)

4

DK GRN

389

Vehicle Speed Output (VSS)

5

BRN/WHT

419

MIL Control

6-9

--

--

Not Used

10

PPL

420

Brake Switch Input

11

PPL

1807

Serial Data (Class II)

12

--

--

Not Used

13

BRN

441

Ignition Positive Voltage

14

--

--

Not Used

15

--

--

Not Used

16

RED

1676

EGR Positive Voltage

17

--

--

Not Used

18

PNK

439

Ignition Positive Voltage

19

--

--

Not Used

20

WHT

257

EGR Valve Control

21

--

--

Not Used

22

--

--

Not Used

23

--

--

Not Used

24

LT BLU/BLK

396

Cruise Engaged Input

Empty without Cruise Control