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

Powertrain Control Module (PCM) - C1


Object Number: 655733  Size: CH

Connector Part Information

    • 12191489
    • 80-Way F Micro-Pack 100W Sealed (BU)

Pin

Wire Color

Circuit No.

Function

1

BK/WH

1551

Ground

2

L-GN

1867

12-Volt Reference

3

--

--

Not Used

4

L-BU/BK

844

Fuel Injector 4 Control

5-6

--

--

Not Used

7

GY

2705

5-Volt Reference A

8

GY

2701

5-Volt Reference A

9

D-BU

496

Knock Sensor 1 Signal

10-11

--

--

Not Used

12

YE

573

CKP Sensor Signal

13-16

--

--

Not Used

17

D-BU

1225

Transmission Fluid Pressure Switch Signal B

18

OG

1226

Transmission Fluid Pressure Switch Signal C

19

PK

439

Ignition 1 Voltage

20

RD/WH

440

Battery Positive Voltage

21

PU

574

Low Reference

22

--

--

Not Used

23

TN

2759

Low Reference

24

BK/WH

1551

Ground

25

TN

1671

HO2S Low Signal - Bank 2 Sensor 2

26

TN

1667

HO2S Low Signal - Bank 2 Sensor 1

27

BK/WH

1551

Ground

28

TN/WH

1669

HO2S Low Signal - Bank 1 Sensor 2

29

TN/WH

1653

HO2S Low Signal - Bank 1 Sensor 1

30-31

--

--

Not Used

32

TN/WH

771

Transmission Range Switch Signal A

33

PU

420

TCC Brake Switch/Cruise Control Release Signal

34

WH

776

Transmission Range Switch Signal P

35

--

--

Not Used

36

TN

1744

Fuel Injector 1 Control

37

PK/BK

1746

Fuel Injector 3 Control

38

--

--

Not Used

39

YE/BK

625

Starter Enable Relay Control

40

BK/WH

1551

Ground

41-42

--

--

Not Used

43

TN/WH

845

Fuel Injector 5 Control

44-45

--

--

Not Used

46

GY

2709

5-Volt Reference B

47

--

--

Not Used

48

GY

597

5-Volt Reference A

49

GY

1716

Low Reference

50-52

--

--

Not Used

53

TN

2762

Low Reference

54

OG/BK

469

Low Reference

55-56

--

--

Not Used

57

RD/WH

440

Battery Positive Voltage

58

D-GN

1049

Class 2 Serial Data

59

--

--

Not Used

60

TN

2752

Low Reference

61

PK/BK

632

Low Reference

62

--

--

Not Used

63

BK

2755

Low Reference

64

BK/WH

1551

Ground

65

PU

1670

HO2S High Signal - Bank 2 Sensor 2

66

PU

1666

HO2S High Signal - Bank 2 Sensor 1

67

BK/WH

1551

Ground

68

PU/WH

1668

HO2S High Signal - Bank 1 Sensor 2

69

PU/WH

1665

HO2S High Signal - Bank 1 Sensor 1

70

BN

1174

Oil Level Switch Signal

71

--

--

Not Used

72

YE

772

Transmission Range Switch Signal B

73

BN/WH

633

CMP Sensor Signal

74

YE

410

ECT Sensor Signal

75

PK

1020

Ignition 0 Voltage

76

L-GN/BK

1745

Fuel Injector 2 Control

77

YE/BK

846

Fuel Injector 6 Control

78

--

--

Not Used

79

WH

687

3-2 Shift Solenoid Valve Control

80

TN

2761

Low Reference

Powertrain Control Module (PCM) - C2


Object Number: 684875  Size: CH

Connector Part Information

    • 12191488
    • 80-Way F Micro-Pack 100W Sealed (GN)

Pin

Wire Color

Circuit No.

Function

1

BK/WH

1551

Ground

2

BN

418

TCC PWM Solenoid Valve Control

3-5

--

--

Not Used

6

OG/BK

1228

PC Solenoid Valve High Control

7

--

--

Not Used

8

L-BU/WH

1229

PC Solenoid Valve Low Control

9

D-GN/WH

465

Fuel Pump Relay Control - Primary

10-12

--

--

Not Used

13

L-BU/BK

396

Cruise Control Engaged Signal

14

--

--

Not Used

15

OG

225

Generator Turn On Signal

16

--

--

Not Used

17

D-GN/WH

2523

A/C Request Signal (C60)

18-19

--

--

Not Used

20

PU

401

Signal Low - Front

21

YE

400

Signal High - Front

22-23

--

--

Not Used

24

D-BU

411

TP Sensor Signal

25

TN

472

IAT Sensor Signal

26

WH

423

IC Timing Control

27-30

--

--

Not Used

31

YE

492

MAF Sensor Signal

32

L-GN

432

MAP Sensor Signal

33

--

--

Not Used

34

D-GN/WH

428

EVAP Canister Purge Solenoid Control

35-36

--

--

Not Used

37

D-GN

83

Cruise Control Inhibit Signal

38

--

--

Not Used

39

OG

631

12-Volt Reference

40

BK/WH

1551

Ground

41

--

--

Not Used

42

TN/BK

422

TCC Solenoid Valve Control

43

D-GN/WH

459

A/C Compressor Clutch Relay Control (C60)

44

--

--

Not Used

45

WH

1310

EVAP Canister Vent Solenoid Control

46

BN/WH

419

MIL Control

47

YE/BK

1223

2-3 Shift Solenoid Valve Control

48

L-GN

1222

1-2 Shift Solenoid Valve Control

49

YE/BK

1827

Vehicle Speed Signal

50

D-GN/WH

817

Vehicle Speed Signal

51

YE/BK

1227

TFT Sensor Signal

52

PU

5035

HO2S Heater Low Control - Bank 1 Sensor 2

53

YE

5036

HO2S Heater Low Control - Bank 2 Sensor 2

54

PU

1589

Fuel Level Sensor Signal

55

D-GN

603

A/C Low Pressure Switch Signal (C60)

56

--

--

Not Used

57

TN

470

Low Reference

58

TN/WH

331

Oil Pressure Sensor Signal

59

PU

806

Crank Voltage

60-61

--

--

Not Used

62

GY

773

Transmission Range Switch Signal C

63

PK

1224

Transmission Fluid Pressure Switch Signal A

64

D-GN

890

Fuel Tank Pressure Sensor Signal

65-71

--

--

Not Used

72

L-BU

5038

HO2S Heater Low Control - Bank 1 Sensor 1

73

--

--

Not Used

74

PU/WH

5037

HO2S Heater Low Control - Bank 2 Sensor 1

75

GY

23

Generator Field Duty Cycle Signal

76

L-GN/WH

1749

IAC Coil B High Control

77

L-GN/BK

444

IAC Coil B Low Control

78

L-BU/BK

1748

IAC Coil A Low Control

79

L-BU/WH

1747

IAC Coil A High Control

80

--

--

Not Used