GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module (PCM) C1


Object Number: 15026  Size: CF

Connector Part Information

    • 80-Way Connector (BLU)
    • Body - 12160549
    • TPA - 1216056A
    • Terminals - 12084913
    • Shield - 12160921

Pin

Wire Color

Circuit No.

Function

1

BLK

808

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

605

5-Volt Reference

11

--

--

Not Used

12

TAN

413

HO2S Low Reference

13

ORN/BLK

469

Low Reference

14-15

--

--

Not Used

16

BLK/WHT

1551

Ground

17

RED/BLK

645

Low Reference

18

--

--

Not Used

19

WHT

1390

Off/Run/Crank Voltage

20

ORN

240

Battery Positive Voltage

21-27

--

--

Not Used

28

TAN

413

HO2S Low Reference

29

TAN

413

HO2S Low Reference

30

PPL

420

TCC Brake Switch/Cruise Control Release Signal

31

BLK

552

Low Reference

32

GRY

435

EGR Solenoid Low Control

33

DK BLU

496

Knock Sensor 1 Signal

34

LT BLU

1876

Knock Sensor 2 Signal

35-37

--

--

Not Used

38

LT GRN/WHT

1749

IAC Coil B High Control

39-42

--

--

Not Used

43

YEL/BLK

846

Fuel Injector 6 Control

44

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

45

--

--

Not Used

46

LT BLU/BLK

844

Fuel Injector 4 Control

47

BLK/WHT

845

Fuel Injector 5 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/WHT

817

Vehicle Speed Signal

56

BLK/WHT

1551

Ground

57

BLK/WHT

1551

Ground

58

PPL

1807

Class 2 Serial Data

59

PPL

1807

Class 2 Serial Data

60

BLK/WHT

1551

Ground

61

BLK

452

Low Reference

62

DK BLU/WHT

1231

AT ISS Low Signal

63

RED/BLK

1230

AT ISS High Signal

64

YEL

400

Signal High - Front

65

PPL

401

Signal Low - Front

66-67

--

--

Not Used

68

YEL

772

Transmission Range Switch Signal B

69

YEL

492

MAF Sensor Signal

70

--

--

Not Used

71

ORN/BLK

463

Requested Torque Signal (w/NV8)

72

DK GRN

83

Cruise Control Inhibit Signal

73

LT GRN/BLK

1745

Fuel Injector 2 Control

74-75

--

--

Not Used

76

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

77-78

--

--

Not Used

79

BLK

1744

Fuel Injector 1 Control

80

BLK

808

Low Reference

Powertrain Control Module (PCM) C2


Object Number: 15026  Size: CF

Connector Part Information

    • 80-Way Connector (CLR)
    • Body - 12160549
    • TPA - 1216056A
    • Terminals - 12084913
    • Shield - 12160921

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

WHT

1310

EVAP Canister Vent Solenoid Control

3

DK GRN/WHT

465

Fuel Pump Relay Control

4

WHT

257

EGR Solenoid High Control

5

BRN/WHT

419

MIL Control

6

--

--

Not Used

7

LT BLU/WHT

1747

IAC Coil A High Control

8

WHT

121

Engine Speed Signal

9

TAN/BLK

464

Delivered Torque Signal (w/NV8)

10

PPL

412

HO2S 1 High Signal

11

PPL

1670

HO2S 2 High Signal

12-15

--

--

Not Used

16

WHT

776

Transmission Range Switch Signal P

17

--

--

Not Used

18

BLK/WHT

771

Transmission Range Switch Signal A

19-22

--

--

Not Used

23

YEL

5

Crank Voltage

24

PNK

39

Ignition 1 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 Valve Position Signal

29

GRY

23

Generator Field Duty Cycle Signal

30

GRY

605

5-Volt Reference

31

--

--

Not Used

32

GRY

605

5-Volt Reference

33

GRY/BLK

605

5-Volt Reference

34

GRY

474

5-Volt Reference

35

BLK

808

Low Reference

36

--

--

Not Used

37

DK GRN

676

HO2S Heater High Control Bank 1 Sensor 1

38

--

--

Not Used

39

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

40-41

--

--

Not Used

42

PNK/BLK

1746

Fuel Injector 3 Control

43

--

--

Not Used

44

LT BLU/BLK

1748

IAC Coil A Low Control

45

RED/BLK

1228

PC Solenoid Valve High Control (Sol. A)

46

LT BLU/WHT

1229

PC Solenoid Valve Low Control (Sol. A)

47

--

--

Not Used

48

BRN/WHT

3123

HO2S Heater High Control Bank 1 Sensor 2

49

LT GRN/BLK

444

IAC Coil B Low Control

50

TAN

472

IAT Sensor Signal

51-52

--

--

Not Used

53

TAN/WHT

331

Oil Pressure Sensor Signal

54

--

--

Not Used

55

DK GRN

890

Fuel Tank Pressure Sensor Signal

56

GRY

773

Transmission Range Switch Signal C

57

--

--

Not Used

58

BRN

1174

Oil Level Switch Signal

59

LT BLU/BLK

396

Cruise Control Engaged Signal

60

GRY

847

Extended Travel Brake Switch Signal

61

RED

225

Generator Turn On Signal

62

--

--

Not Used

63

YEL

657

TCC Release Switch Signal

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 Signal

70-75

--

--

Not Used

76

YEL

447

Starter Relay Coil Control

77

--

--

Not Used

78

BRN

418

TCC PWM Solenoid Valve Control

79-80

--

--

Not Used