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

Powertrain Control Module (PCM) C1


Object Number: 1335548  Size: CH

Connector Part Information

  • OEM: 15450304
  • Service: 88988487
  • Description: 56-Way F (BU)

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

--

--

Not Used

4

GY

2700

5-Volt Reference

5

--

--

Not Used

6

BN/WH

419

MIL Control

7

TN

5514

Low Reference

8-9

--

--

Not Used

10

WH

1310

EVAP Canister Vent Solenoid Control

11

--

--

Not Used

12

TN

2759

Low Reference

13-17

--

--

Not Used

18

YE

743

Accessory Voltage

19

PK

639

Ignition 1 Voltage

20

RD/WH

1440

Battery Positive Voltage

21

--

--

Not Used

22

BN

818

VSS Signal

23

YE

447

Starter Relay Coil Control

24

BN

5069

Engine Main Relay Coil Control

25

--

--

Not Used

26

D-GN

890

Fuel Tank Pressure Sensor Signal

27-30

--

--

Not Used

31

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

32

L-BU

20

Stop Lamp Supply Voltage

33

D-GN/WH

459

A/C Compressor Clutch Relay Control

34-36

--

--

Not Used

37

D-GN/WH

465

Fuel Pump Primary Relay Control

38

OG/BK

1786

Transmission Park/Neutral Signal

39-42

--

--

Not Used

43

PU

1589

Primary Fuel Level Sensor Signal

44

GY

1884

Cruise Control Set/Coast/Resume/Accelerate Switch Signal

45

--

--

Not Used

46

PU

420

Torque Converter Clutch Brake Switch Signal

47

--

--

Not Used

48

D-GN

335

Low Speed Cooling Fan Relay Control

49

--

--

Not Used

50

D-BU

473

High Speed Cooling Fan Relay Control

51-52

--

--

Not Used

53

GY

2709

Fuel Tank Pressure Sensor 5-Volt Reference

54-56

--

--

Not Used

Powertrain Control Module (PCM) C2


Object Number: 1332467  Size: CH

Connector Part Information

  • OEM: 15450306
  • Service: 88988489
  • Description: 73-Way F (BK)

Powertrain Control Module (PCM) C2

Pin

Wire Color

Circuit No.

Function

1

BN

1456

Exhaust Gas Recirculation Valve Position Signal

2

TN

800

UART Serial Data 1

3

OG/BK

1061

UART Serial Data 2

4

PK/BK

1746

Fuel Injector Control 3

5

TN

1744

Fuel Injector Control 1

6

L-GN/BK

1745

Fuel Injector Control 2

7

TN/WH

845

Fuel Injector Control 5

8

TN

2753

Exhaust Gas Recirculation Sensor Low Reference

9

YE/BK

846

Fuel Injector Control 6

10

L-BU/BK

844

Fuel Injector Control 4

11

OG/WH

2122

IC 2 Control

12

GY/WH

3113

Heated Oxygen Sensor Heater Low Control Bank 1 Sensor 1

13

OG

1676

Exhaust Gas Recirculation Solenoid Supply Voltage

14

--

--

Not Used

15

PU

574

Low Reference

16

GY

435

Exhaust Gas Recirculation Solenoid Control

17

--

--

Not Used

18

L-GN

432

Manifold Absolute Pressure Sensor Signal

19-20

--

--

Not Used

21

OG

631

Camshaft Sensor 12-Volt Reference

22

L-GN

1867

Crankshaft Position Sensor 12-Volt Reference

23-25

--

--

Not Used

26

BN/WH

633

Camshaft Position Sensor Signal

27

L-BU/BK

647

Medium Resolution Engine Speed Signal

28-29

--

--

Not Used

30

OG/BK

469

Manifold Absolute Pressure Sensor Low Reference

31

--

--

Not Used

32

PK/BK

632

Camshaft Position Sensor Low Reference

33

GY

5047

Exhaust Gas Recirculation 5-Volt Reference

34

GY

2704

5-Volt Reference

35

--

--

Not Used

36

GY

2303

KS 2 Signal

37

YE

2174

Ignition Control Timing Low Reference 1

38

D-BU

496

KS 1 Signal

39

BK/WH

1251

Ground

40

GY

1716

KS 1 Signal

41

D-GN/WH

428

EVAP Canister Purge Solenoid Control

42-46

--

--

Not Used

47

TN/WH

1653

HO2S 1 Low Signal

48

PU/WH

1665

HO2S 1 High Signal

49-52

--

--

Not Used

53

OG

225

Generator Turn On Signal

54

L-BU

1876

KS 2 Signal

55

YE

410

Engine Coolant Temperature Sensor Signal

56

BK/WH

1351

Ground

57

TN/BK

231

Oil Pressure Switch Signal

58-60

--

--

Not Used

61

PU

2121

IC 1 Control

62

--

--

Not Used

63

L-BU

2123

Ignition Control 3

64-72

--

--

Not Used

73

BK/WH

451

Ground

Powertrain Control Module (PCM) C3


Object Number: 1335548  Size: CH

Connector Part Information

  • OEM: 15450305
  • Service: 88988488
  • Description: 56-Way F (L-GY)

Powertrain Control Module (PCM) C3

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Used

4

TN/WH

1669

HO2S 2 Low Signal

5

--

--

Not Used

6

YE

492

Mass Air Flow Sensor Signal

7

--

--

Not Used

8

GY/WH

3122

HO2S 2 Heater Low Control

9-18

--

--

Not Used

19

PU/WH

1668

HO2S 2 High Signal

20-25

--

--

Not Used

26

TN

472

Intake Air Temperature Sensor Signal

27-49

--

--

Not Used

50

TN

2760

Intake Air Temperature Sensor Low Reference

51-56

--

--

Not Used