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

PCM Connector C1


Object Number: 15026  Size: CF

Connector Part Information

    • Blue PCM Connector C1
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

BLK

2762

TFT Sensor Ground

2

--

--

Not Used

3

ORN

55

Fuel Gage Control

4

LT GRN

1222

Shift Solenoid A Control (1-2 Shift Solenoid Valve)

5

DK BLU

473

High Speed Fans Control

6

DK GRN

335

Low Speed Fans Control

7

BLK

630

Camshaft Position (CMP) Sensor Signal

8

PPL/WHT

430

3X Reference High

9

LT BLU/BLK

647

24X Crankshaft Position (CKP) Sensor Signal

10

GRY

2704

5V Reference A

11-12

--

--

Not Used

13

ORN/BLK

469

Sensor Ground

14

--

--

Not Used

15

TAN

800

Serial Data (UART)

16

BLK/WHT

451

PCM Ground

17

BLK

808

Sensor Ground

18

--

--

Not Used

19

PNK

339

Ignition Positive Voltage

20

ORN

540

Battery Positive Voltage

21

--

--

Not Used

22

PNK

1224

Transaxle range A Input

23-27

--

--

Not Used

28

TAN/WHT

1669

HO2S 2 Low

29

TAN

413

HO2S1 Low

30

PPL

420

Stop Lamp Switch

31

BLK

2753

EGR Sensor Ground

32

GRY/BLK

435

EGR Valve Control

33

DK BLU

496

KS Signal

34-35

--

--

Not Used

36

BRN

25

Charge Warning Indicator Control

37

--

--

Not Used

38

LT GRN/WHT

1749

IAC B High

39-42

--

--

Not Used

43

BLK

1744

Fuel Injector #1 Control

44

YEL/BLK

1223

2-3 Shift Solenoid Control Valve

45

PNK/BLK

429

Secondary AIR Injection Valve Solenoid

46

PNK/BLK

1746

Fuel Injector #3 Control

47

LT GRN/BLK

1745

Fuel Injector #2 Control

48

RED/BLK

453

3X Ref Low

49-52

--

--

Not Used

53

TAN/BLK

424

Bypass

54

WHT

423

Ignition Control (IC)

55

DK GRN

389

Vehicle Speed Sensor Output

56

BLK/WHT

451

PCM Ground

57

BLK/WHT

451

PCM Ground

58

--

--

Not Used

59

PPL

1807

Class II Data

60

BLK / WHT

451

PCM Ground

61

BLK

2752

Sensor Ground

62

RED/BLK

1230

A/T ISS Sensor High

63

DK BLU/WHT

1231

A/T ISS Sensor Low

64

YEL

400

VSS High

65

PPL

401

VSS Low

66-67

--

--

Not Used

68

YEL

772

Transaxle Range Switch

69

YEL

492

MAF Sensor Signal

70

DK BLU

229

Theft Deterrent Fuel Enable Signal

71

--

--

Not Used

72

DK GRN

83

Cruise Disable/Inhibit Control

73

BLK/WHT

845

Fuel Injector #5 Control

74

--

--

Not Used

75

DK GRN

35

Engine Hot Lamp

76

DK GRN/WHT

428

EVAP Canister Purge Valve Control

77-78

--

--

Not Used

79

YEL/BLK

846

Fuel Injector #6 Control

80

BLK

2751

5V Reference Return

PCM Connector C2


Object Number: 15030  Size: CF

Connector Part Information

    • Clear PCM Connector 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 Ignition System Voltage

5

BRN/WHT

419

MIL Control

6

BRN/WHT

1173

Low Oil Level Indicator Control

7

LT BLU/WHT

1747

IAC A High

8-9

--

--

Not Used

10

PPL

412

HO2S 1 Signal

11

PPL/WHT

1668

HO2S 2 Signal

12-15

--

--

Not Used

16

WHT

776

Transaxle Range Switch D

17

RED

1226

Transaxle Range C Input

18

BLK/WHT

771

Transaxle Range Switch A

19-21

--

--

Not Used

22

LT GRN

66

A/C Request

23-24

--

--

Not Used

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

5V Reference Supply

31

--

--

Not Used

32

GRY

2709

5V Reference B

33

GRY

2701

5 Volt Reference A

34

GRY

2700

5 Volt Reference B

35

BLK

808

Sensor Ground

36

GRY

803

Change Oil Soon Indicator Control Circuit

37-38

--

--

Not Used

39

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

40-41

--

--

Not Used

42

LT BLU/BLK

844

Fuel Injector #4 Control

43

--

--

Not Used

44

LT BLU/BLK

1748

IAC Valve 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 Valve B Low

50

TAN

472

Intake Air Temperature Sensor

51-54

--

--

Not Used

55

DK GRN

890

Fuel Tank Pressure Sensor Signal

56

GRY

773

Transaxle Range Switch C

57

--

--

Not Used

58

BRN

1174

Engine Oil Level Switch Input

59

WHT

85

Cruise Status (Engaged Input)

60

--

--

Not Used

61

RED

225

Generator L Terminal 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

1227

Transaxle Fluid Temperature (TFT) Sensor

69

PPL

30

Fuel Level Sensor Signal

70-71

--

--

Not Used

72

RED/WHT

812

CMP/CKP Sensor Battery Positive Voltage

73

BLK

407

CMP Sensor Ground

74

YEL/BLK

1868

CKP Sensor Ground

75

BRN

436

AIR Pump Relay

78

BRN

418

TCC PWM Solenoid Control

79

TAN/BLK

422

Torque Converter Clutch Solenoid

80

--

--

Not Used