GM Service Manual Online
For 1990-2009 cars only
Connector 1: Powertrain Control Module (PCM) C1
Connector 2: Powertrain Control Module (PCM) C2
Connector 3: Powertrain Control Module (PCM) C3 (MU3)

Powertrain Control Module (PCM) C1


Object Number: 1228485  Size: CH

Connector Part Information

  • OEM: 15480017
  • Service: 88953346
  • Description: 56-Way F Micro 64 Sealed (BU)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Powertrain Control Module (PCM) C1

Pin

Wire Color

Circuit No.

Function

1

TN/BK

2500

High Speed GMLAN Serial Data (+)

2

TN

2501

High Speed GMLAN Serial Data (-)

3-5

--

--

Not Used

6

D-GN/WH

459

A/C Compressor Clutch Relay Control

7

BN

1271

Low Reference

8

PU

1272

Low Reference

9

--

--

Not Used

10

D-BU

473

High Speed Cooling Fan Relay Control

11

--

--

Not Used

12

PU

1589

Fuel Level Sensor Signal

13

PK/BK

5293

Ignition 1 Voltage

14

L-BU

6118

IAT 2 Sensor Signal

15

--

--

Not Used

16

D-GN

1049

ECM/PCM/VCM Class 2 Serial Data

17

GY

2700

5-Volt Reference - 1

18

BN

4

Accessory Voltage

19

PK/BK

1039

Ignition 1 Voltage

20

RD/WH

840

Battery Positive Voltage

21

--

--

Not Used

22

WH

1310

EVAP Canister Vent Solenoid Control

23

--

--

Not Used

24

D-GN

890

Fuel Tank Pressure Sensor Signal

25

--

--

Not Used

26

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

27

D-BU

1161

APP Sensor 1 Signal

28

--

--

Not Used

29

TN

2759

Low Reference

30

WH/BK

1164

5-Volt Reference - B

31

--

--

Not Used

32

L-BU

20

Stop Lamp Switch Signal

33

--

--

Not Used

34

PK

2014

Coolant Pump Relay Control

35-36

--

--

Not Used

37

D-GN/WH

465

Fuel Pump Relay Control

38

BN

5069

Powertrain Relay Control

39

--

--

Not Used

40

BN/WH

419

MIL Control

41

L-BU

1162

APP Sensor 2 Signal

42

--

--

Not Used

43

TN

1274

5-Volt Reference - 1

44-45

--

--

Not Used

46

PU

420

TCC Brake Switch/Cruise Control Release Signal

47

GY

2709

5-Volt Reference - 1

48

YE

447

Starter Relay Coil Control

49-50

--

--

Not Used

51

D-GN

335

Low Speed Cooling Fan Relay Control

52

--

--

Not Used

53

BN/WH

379

CPP Switch Signal

54

D-GN

1433

PNP/Clutch Start Switch Signal

55

--

--

Not Used

56

BK/WH

2751

Ground

Powertrain Control Module (PCM) C2


Object Number: 1332467  Size: CH

Connector Part Information

  • OEM: 15468092
  • Service: 88953274
  • Description: 73-Way F GT 280 Micro 64 Sealed (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Powertrain Control Module (PCM) C2

Pin

Wire Color

Circuit No.

Function

1

RD

225

Generator Turn On Signal

2

D-GN

485

TP Sensor 1 Signal

3

--

--

Not Used

4

GY

596

5-Volt Reference - 1

5

GY

2704

5-Volt Reference - 1

6

GY

2701

5-Volt Reference - 1

7

PU

486

TP Sensor 2 Signal

8

D-GN

6291

5-Volt Reference - 2

9

L-BU/BK

1688

5-Volt Reference - 2

10-15

--

--

Not Used

16

PU

6413

Low Reference

17

YE

573

CKP Sensor [1] Signal

18

PU

574

Low Reference

19

--

--

Not Used

20

D-GN/WH

6292

Low Reference

21

PK/BK

632

Low Reference

22-24

--

--

Not Used

25

TN/WH

1669

HO2S Low Signal Bank 1 Sensor (2)

26

BN/WH

633

CMP Sensor Signal

27-28

--

--

Not Used

29

GY

1724

Boost Control Solenoid Control

30

OG/BK

469

Low Reference

31

--

--

Not Used

32

TN

1667

HO2S Low Signal Bank 2 Sensor (1)

33

BK

1744

Fuel Injector (1) Control

34

--

--

Not Used

35

YE

410

ECT Sensor Signal

36

BK/WH

1704

Low Reference

37

GY

6337

MAP Sensor Signal

38

L-GN

432

SCIP Sensor Signal

39

BK

2752

Low Reference

40

BN/WH

6405

IC 1 Control

41

YE

492

MAF Sensor Signal

42

D-GN/WH

6407

IC 4 Control

43

BK/WH

1423

HO2S Heater Low Control Bank 1 Sensor (2)

44

--

--

Not Used

45

GY

23

Generator Field Duty Cycle Signal

46

PU/WH

1668

HO2S High Signal Bank 1 Sensor (2)

47

--

--

Not Used

48

PU

1666

HO2S High Signal Bank 2 Sensor (1)

49-50

--

--

Not Used

51

TN

472

IAT Sensor Signal

52

BK

2761

Low Reference

53

L-GN/BK

1745

Fuel Injector 2 Control

54

L-BU/BK

844

Fuel Injector 4 Control

55

PK/BK

1746

Fuel Injector 3 Control

56-57

--

--

Not Used

58

D-GN

676

HO2S Heater High Control Bank 1 Sensor (1)

59

D-BU/WH

6406

IC 3 Control

60

L-BU/WH

6408

IC 2 Control

61-63

--

--

Not Used

64

BK

2760

Low Reference

65

BN

582

TAC Motor Control - 2

66

YE

581

TAC Motor Control - 1

67

--

--

Not Used

68

D-BU

496

Knock Sensor (1) Signal

69

GY

1716

Knock Sensor Signal

70-72

--

--

Not Used

73

BK/WH

451

Ground

Powertrain Control Module (PCM) C3 (MU3)


Object Number: 1283894  Size: CH

Connector Part Information

  • OEM: 15468091
  • Service: 88953347
  • Description: 56-Way F Micro 64 Sealed (GY)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Powertrain Control Module (PCM) C3 (MU3)

Pin

Wire Color

Circuit No.

Function

1-9

--

--

Not Used

10

TN

891

Boost Gage Signal

11-14

--

--

Not Used

15

TN/BK

231

Oil Pressure Switch Signal

16-21

--

--

Not Used

22

WH/BK

2932

5-Volt Reference - 1

23-30

--

--

Not Used

31

GY/BK

433

BARO Sensor Signal

32-35

--

--

Not Used

36

OG/BK

6014

Low Reference

37

D-GN/WH

428

EVAP Canister Purge Solenoid Control

38-43

--

--

Not Used

44

PU

401

VSS Low Signal

45

YE

400

VSS High Signal

46-56

--

--

Not Used