GM Service Manual Online
For 1990-2009 cars only
Table 1: Powertrain Control Module (PCM) Connector C1
Table 2: Powertrain Control Module (PCM) Connector C2

Powertrain Control Module (PCM) Connector C1


Object Number: 15026  Size: CF

Connector Part Information

    • Blue PCM C1
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

BLK

2762

Low Reference

2-3

--

--

Not Used

4

LT GRN

1222

1-2 Shift Solenoid Valve Control

5

DK BLU

473

High Speed Cooling Fan Relay Control

6

DK GRN

335

Low Speed Cooling Fan Relay Control

7

BLK

630

Camshaft Position Signal

8

PPL/WHT

430

Low Resolution Engine Speed Signal

9

LT BLU/BLK

647

Medium Resolution Engine Speed Signal

10

GRY

2704

5 Volt Reference

11

--

--

Not Used

12

TAN

413

HO2S Low Signal

13

ORN/BLK

469

Low Reference

14-15

--

--

Not Used

16

BLK/WHT

451

Ground

17

BLK

2760

Low Reference

18

--

--

Not Used

19

PNK

1020

Off/Run/Crank Voltage

20

ORN

540

Battery Positive Voltage

21

--

--

Not Used

22

PNK

1224

Transmission Range Switch Signal A

23-27

--

--

Not Used

28

TAN/WHT

1669

HO2S Low Signal [- Bank 1 Sensor X]

29

BLK

808

Oxygen Sensor A Low

30

PPL

420

TCC Brake Switch Input

31

BLK

2753

32

GRY

435

EGR Solenoid Control

33

DK BLU

496

KS [1] Signal

34-37

--

--

Not Used

38

LT GRN/WHT

1749

IAC Coil B High Control

39-42

--

--

Not Used

43

BLK

1744

Fuel Injector 1 Control

44

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

45

PNK/BLK

429

AIR Solenoid Control

46

PNK/BLK

1746

Fuel Injector 3 Control

47

LT GRN/BLK

1745

Fuel Injector 2 Control

48

RED/BLK

453

Low Reference

49-52

--

--

Not Used

53

TAN/BLK

424

IC Timing Signal

54

WHT

423

IC Timing Control

55

DK GRN

389

Vehicle Speed Signal

56

BLK/WHT

451

Ground

57

BLK/WHT

451

Ground

58

--

--

Not Used

59

DK GRN

1049

ECM/PCM/VCM Class 2 Serial Data

60

BLK/WHT

451

Ground

61

BLK

2752

Low Reference

62

DK BLU/WHT

1231

AT/ISS Low Signal

63

RED/BLK

1230

AT/ISS High Signal

64

YEL

400

VSS High Signal

65

PPL

401

VSS Low Signal

66-67

--

--

Not Used

68

YEL

772

Transaxle Range Switch Signal B

69

YEL

492

MAF Sensor Signal

70

--

--

Not Used

71

ORN/BLK

463

Requested Torque Signal

72

DK GRN

83

Cruise Control Inhibit Signal

73

BLK/WHT

845

Fuel Injector 5 Control

74-75

--

--

Not Used

76

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

77-78

--

--

Not Used

79

YEL/BLK

846

Fuel Injector 6 Control

80

BLK

2751

Ground

Powertrain Control Module (PCM) Connector C2


Object Number: 15030  Size: CF

Connector Part Information

    • Clear PCM C2
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

WHT

1310

EVAP Canister Vent Valve Control

3

DK GRN/WHT

465

Fuel Pump Relay Control

4

RED

1676

EGR Valve Feed Circuit

5

BRN/WHT

419

MIL Control

6

--

--

Not Used

7

LT BLU/WHT

1747

IAC Coil A High

8

--

--

Not Used

9

TAN/BLK

464

Delivered Torque

10

PPL

412

HO2S Sensor 1 Signal High

11

PPL/WHT

1668

HO2S Sensor 2 Signal High

12-15

--

--

Not Used

16

WHT

776

Transaxle Range Switch Parity

17

RED

1226

Trans Fluid Pressure Switch Input A

18

BLK/WHT

771

Transaxle Range Switch Input A

19

TAN/BLK

231

Oil Pressure Switch

20-21

--

--

Not Used

22

DK GRN/WHT

762

A/C Request Signal

23

PPL

806

Crank

24

PNK

439

IGN Positive Voltage

25

LT GRN

432

MAP Sensor Signal

26

YEL

410

ECT Sensor Signal

27

RED/BLK

380

A/C Refrigerant Pressure Sensor Signal

28

BRN

1456

EGR Pintle Position Signal

29

--

--

Not Used

30

GRY

2702

5 Volt Reference

31-32

--

--

Not Used

33

GRY

2701

5 Volt Reference A

34

GRY

2700

5 Volt Reference B

35

BLK

2759

Sensor Ground

36

--

--

Not Used

37

BLK/WHT

3113

Oxygen Sensor A Heater Control

38

--

--

Not Used

39

DK GRN/WHT

459

A/C Compressor Relay Control

40-41

--

--

Not Used

42

LT BLU/BLK

844

Fuel Injection 4 Control

43

--

--

Not Used

44

LT BLU/BLK

1748

IAC Coil A Low

45

RED/BLK

1228

PC Solenoid Valve High

46

LT BLU/WHT

1229

PC Solenoid Valve Low

47-48

--

--

Not Used

49

LT GRN/BLK

444

IAC Coil B Low

50

TAN

472

IAT Sensor Signal

51-54

--

--

Not Used

55

DK GRN

890

Fuel Tank Pressure Input

56

GRY

773

Transaxle Range Switch Input C

57

DK BLU

1225

Trans Fluid Pressure Switch B input

58

BRN

1174

Engine Oil Level Indicator Input

59

WHT

85

Cruise Engaged Input

60

--

--

Not Used

61

RED

225

Generator Control

62

--

--

Not Used

63

YEL

657

TCC Release Switch Input

64-65

--

--

Not Used

66

DK BLU

417

TP Sensor Signal

67

--

--

Not Used

68

YEL/BLK

1227

TFT Sensor Signal

69

PPL

1589

Fuel Level Sensor Input

70

LT GRN

1867

CMP/CKP Sensor Ground

71

--

--

Not Used

72

RED/WHT

812

CMP/CKP Sensor Battery Positive Voltage

73

BLK

407

CMP/CKP Sensor Ground

74

YEL/BLK

1868

CMP/CKP Sensor Battery Positive Voltage

75

BRN

436

Air Pump Relay Control

76

YEL/BLK

625

Crank Relay Control

77

--

--

Not Used

78

BRN

418

TCC PWM Solenoid Control

79

--

--

Not Used

80

BLK

808

Digital Sensor Return