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

    • Complete Assembly (W/O TPA) - 12191488
    • TPA (Blue) - 12176408
    • Terminal - 12084913

Pin

Wire Color

Circuit No.

Function

1

ORN

1799

High Resolution Signal

2

LT BLU/WHT

1800

CKP Sensor A Signal

3-4

--

--

Not Used

5

DK GRN

890

Fuel Tank Pressure Sensor Signal

6

YEL

5

Crank Voltage

7-9

--

--

Not Used

10

TAN

472

IAT Sensor Signal

11

GRY

773

Transmission Range Switch Signal C

12

YEL

772

Transmission Range Switch Signal B

13

BLK/WHT

771

Transmission Range Switch Signal A

14

YEL/BLK

573

CKP Sensor B Signal

15

--

--

Not Used

16

DK BLU/WHT

1231

AT ISS Low Signal

17

RED/WHT

1230

AT ISS High Signal

18

PPL

1807

Class 2 Serial Data

19

LT GRN

147

Off/Run Voltage

20

ORN

2240

Battery Positive Voltage

21

ORN

2240

Battery Positive Voltage

22

RED

2127

IC 7 Control

23

LT GRN

432

MAP Sensor Signal

24

--

--

Not Used

25

DK GRN

335

Low Speed Cooling Fan Relay Control

26

DK GRN/WHT

817

Vehicle Speed Signal

27

LT GRN/BLK

444

IAC Coil B Low Control

28

LT GRN/WHT

1749

IAC Coil B High Control

29

LT BLU/WHT

1747

IAC Coil A High Control

30

LT BLU/BLK

1748

IAC Coil A Low Control

31

DK GRN

676

HO2S Heater High Control - Bank 1 Sensor 1

32

BRN/WHT

419

MIL Control

33

BRN

3122

HO2S Heater Low Control - Bank 2 Sensor 1

34

TAN/BLK

464

Delivered Torque Signal

35

DK GRN

83

Cruise Control Inhibit Signal

36

--

--

Not Used

37

BLK

1744

Fuel Injector 1 Control

38

PNK/BLK

1746

Fuel Injector 3 Control

39

LT GRN/BLK

1745

Fuel Injector 2 Control

40

BLK/WHT

845

Fuel Injector 5 Control

41

WHT

776

Transmission Range Switch Signal P

42

YEL

492

MAF Sensor Signal

43

ORN/BLK

463

Requested Torque Signal

44

GRY

847

Extended Travel Brake Switch Signal

45-49

--

--

Not Used

50

DK BLU/WHT

1677

HO2S Low Signal - Bank 1 Sensor 2

51

DK GRN/WHT

1678

HO2S High Signal - Bank 1 Sensor 2

52

TAN

1664

HO2S Low Signal - Bank 1 Sensor 1

53

PPL/WHT

1665

HO2S High Signal - Bank 1 Sensor 1

54

TAN/WHT

1669

HO2S Low Signal - Bank 2 Sensor 1

55

PPL/WHT

1668

HO2S High Signal - Bank 2 Sensor 1

56

YEL

400

Signal High - Front

57

PPL

401

Signal Low - Front

58

RED

631

12 Volt Reference

59

PPL

1807

Class 2 Serial Data

60

BLK/WHT

451

Ground

61

PPL

2121

IC 1 Control

62

DK BLU

417

TP Sensor Signal

63

PNK

639

Ignition 1 Voltage

64-65

--

--

Not Used

66

PNK/BLK

429

Air Solenoid Control

67

LT BLU/WHT

1229

PC Solenoid Valve Low Control

68

TAN/WHT

1312

HO2S Heater Low Control - Bank 1 Sensor 1

69

RED/BLK

1228

PC Solenoid Valve High Control

70

DK GRN/WHT

465

Fuel Pump Relay Control

71

RED

1676

EGR Valve Supply Voltage

72

PPL

1490

Chassis Pitch Signal

73

WHT

1310

EVAP Canister Vent Solenoid Control

74

--

--

Not Used

75

BRN

436

Secondary Air Injection (AIR) Pump Relay Control

76

LT BLU/BLK

844

Fuel Injector 4 Control

77

YEL/BLK

846

Fuel Injector 6 Control

78

--

--

Not Used

79

DK BLU/WHT

878

Fuel Injector 8 Control

80

RED/BLK

877

Fuel Injector 7 Control

PCM Connector C2


Object Number: 15030  Size: CF

Connector Part Information

    • Complete Assembly (W/O TPA) - 12191488
    • TPA (Clear) - 12176409
    • Terminal - 12084913

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Used

3

BLK/WHT

451

Ground

4

BLK

2760

Low Reference

5

--

--

Not Used

6

ORN/BLK

469

Low Reference

7-8

--

--

Not Used

9

YEL

2174

Low Reference

10

--

--

Not Used

11

BLK

2762

Low Reference

12

BLK

2753

Low Reference

13

BLK

2759

Low Reference

14

--

--

Not Used

15

BLK/WHT

451

Ground

16

--

--

Not Used

17

GRY

2709

5 Volt Reference

18

--

--

Not Used

19

DK BLU

496

KS 1 Signal

20

TAN/BLK

231

Oil Pressure Switch Signal

21

LT BLU

2123

IC 3 Control

22

RED/WHT

2122

IC 2 Control

23

BRN

1174

Oil Level Switch Signal

24

LT BLU/BLK

396

Cruise Control Engaged Signal

25

LT GRN

2867

12 Volt Reference

26

BLK/WHT

451

Ground

27

--

--

Not Used

28

YEL

2868

Low Reference

29-30

--

--

Not Used

31

YEL

410

ECT Sensor Signal

32

YEL

1227

TFT Sensor Signal

33-34

--

--

Not Used

35

GRY

1716

Low Reference

36

--

--

Not Used

37

RED

1226

Transmission Fluid Pressure Switch Signal C

38-39

--

--

Not Used

40

RED

225

Generator Turn ON Signal

41

--

--

Not Used

42

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

43

LT GRN

1222

1 - 2 Shift Solenoid Valve Control

44

YEL

447

Starter Relay Control

45

YEL/BLK

1223

2 - 3 Shift Solenoid Valve Control

46

TAN/BLK

422

TCC Solenoid Valve Control

47

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

48

BLK/WHT

1423

HO2S Heater Low Control - Bank 1 Sensor 2

49

GRY

474

5 Volt Reference

50

GRY

2702

5 Volt Reference

51

GRY

2701

5 Volt Reference

52

BRN

1456

EGR Valve Position Signal

53-54

--

--

Not Used

55

DK BLU

473

High Speed Cooling Fan Relay Control

56

WHT

121

Engine Speed Signal

57-58

--

--

Not Used

59

DK GRN/WHT

2124

IC 4 Control

60

LT BLU/WHT

2126

IC 6 Control

61

PPL/WHT

2128

IC 8 Control

62

DK GRN

2125

IC 5 Control

63-64

--

--

Not Used

65

LT GRN/BLK

1867

12 Volt Reference

66

YEL/BLK

1868

Low Reference

67

PNK/BLK

632

Low Reference

68

BRN

718

Low Reference

69

BLK

2752

Low Reference

70

GRY

435

EGR Solenoid Control

71

GRY

2175

Low Reference

72

--

--

Not Used

73

PNK

1224

Transmission Fluid Pressure Switch Signal A

74-78

--

--

Not Used

79

GRY

23

Generator Field Duty Cycle Signal

80

PPL

420

TCC Brake Switch Signal