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

PCM Connector C1 (Red)


Object Number: 23346  Size: CF

Connector Part Information

    • PCM Connector C1 (Red)
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

YEL

447

Starter Relay Control

2-3

-

-

Not Used

4

BRN/WHT

633

Camshaft Position Sensor Signal

5-8

-

-

Not Used

9

LT GRN/BLK

1745

Injector #2 Control

10-11

-

-

Not Used

12

LT BLU/BLK

877

Injector #7 Control

13

LT BLU

2123

Ignition #3 Control

14

DK GRN

59

A/C Status Signal

15

BLK/WHT

845

Injector #5 Control

16

PPL

806

Crank Request Signal

17

-

-

Not Used

18

YEL/BLK

846

Injector #6 Control

19-20

-

-

Not Used

21

BLK

552

IAT Sensor Ground

22

-

-

Not Used

23

PNK/BLK

1746

Injector #3 Control

24

BLK

999

Sensor Ground Jumper

25-26

-

-

Not Used

27

LT BLU/BLK

844

Injector #4 Control

28-30

-

-

Not Used

31

DK BLU/WHT

878

Injector #8 Control

32

ORN/BLK

434

Park/Neutral Position Signal

33

BLK

1744

Injector #1 Control

34-36

-

-

Not Used

37

BRN/WHT

419

MIL Control

38-43

-

-

Not Used

44

DK BLU/WHT

1869

Crankshaft Position Sensor Signal

45

DK GRN/WHT

428

EVAP Canister Purge Valve Control

46

DK GRN/WHT

817

VSS Signal

47

-

-

Not Used

48

YEL

492

MAF Signal

49

PPL

2121

Ignition #1 Control

50-51

-

-

Not Used

52

PPL/WHT

2128

Ignition #8 Control

53

DK GRN/WHT

2124

Ignition #4 Control

54

LT BLU/WHT

2126

Ignition #6 Control

55

-

-

Not Used

56

DK GRN

2125

Ignition #5 Control

57

RED

2127

Ignition #7 Control

58

RED/WHT

2122

Ignition #2 Control

59

BRN/WHT

2130

Ignition Control Reference Low Bank 2

60

BRN

2129

Ignition Control Reference Low Bank 1

61

-

-

Not Used

62

RED/BLK

645

EGR Valve Ground

63-71

-

-

Not Used

72

BLK/WHT

451

PCM Ground

73-75

-

-

Not Used

76

BLK/WHT

451

PCM Ground

77

PPL

420

Brake Switch Signal

78-80

-

-

Not Used

PCM Connector C2 (Blue)


Object Number: 23346  Size: CF

Connector Part Information

    • PCM Connector C2 (Blue)
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

TAN

1671

HO2S Signal Low Bank 2 Sensor 2

2

TAN/WHT

1669

HO2S Signal Low Bank 1 Sensor 2

3

-

-

Not Used

4

RED

631

Camshaft Position Sensor B+ Supply

5

TAN

1667

HO2S Signal Low Bank 2 Sensor 1

6

TAN/WHT

1653

HO2S Signal Low Bank 1 Sensor 1

7

-

-

Not Used

8

TAN

472

IAT Sensor Signal

9

BRN

1456

EGR Valve Pintle Position Signal

10-18

-

-

Not Used

19

PNK

439

PCM Ignition Positive Voltage

20

ORN

440

PCM Battery Positive Voltage

21

BLK/WHT

451

PCM Ground

22

YEL/BLK

1868

Crankshaft Position Sensor Ground

23

-

-

Not Used

24

BLK

999

Sensor Ground Jumper

25

BLK/WHT

1704

ECT Sensor Ground

26

BLK

407

MAP Sensor Ground

27

WHT/BLK

499

Reduced Engine Power Lamp Control

28-33

-

-

Not Used

34

GRY

435

EGR Valve Ground

35

WHT

121

Tachometer Control Signal

36

-

-

Not Used

37

DK GRN/WHT

465

Fuel Pump Relay Control

38

RED

1676

EGR Valve Control

39-40

-

-

Not Used

41

PPL

1670

HO2S Signal High Bank 2 Sensor 2

42

PPL/WHT

1668

HO2S Signal High Bank 1 Sensor 2

44-45

-

-

Not Used

46

PPL

1666

HO2S Signal High Bank 2 Sensor 1

47

PPL/WHT

1665

HO2S Signal High Bank 1 Sensor 1

48

LT GRN

432

MAP Sensor Signal

49

YEL

410

ECT Sensor Signal

50-57

-

-

Not Used

58

PPL

1807

Serial Data Class 2

59

-

-

Not Used

60

BLK/WHT

451

PCM Ground

61

ORN

440

Ignition Battery Voltage

62

LT GRN

1867

Crankshaft Position Sensor Battery Voltage Supply

63

-

-

Not Used

64

GRY

605

MAP Sensor 5.0 Volt Reference

65

GRY-

-416

EGR Position 5.0 Volt Reference

66-67

-

-

Not Used

68

LT BLU

1876

KS Signal Bank #2

69

DK BLU

496

KS Signal Bank #1

70

PNK/BLK

632

Camshaft Position Sensor Ground

71

ORN/BLK

1061

TAC Module Serial Data

72

DK BLU/WHT

774

TAC Module Serial Data

73-80

-

-

Not Used