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: 1228485  Size: CH

Connector Part Information

  • OEM: 15430208
  • Service:
  • Description: 56-Way F Micro-Pack 64 Series Sealed (BU)

Powertrain Control Module (PCM) C1

Pin

Wire Color

Circuit No.

Function

1

TN/BK

2500

High Speed GMLAN Serial Data Bus+

2

TN

2501

High Speed GMLAN Serial Data Bus-

3

--

--

Not Used

4

GY

2700

5-Volt Reference B

5

--

--

Not Used

6

BN/WH

419

MIL Control

7

TN

5514

Low Reference

8

OG/BK

1057

Low Reference

9

--

--

Not Used

10

WH

1310

EVAP Canister Vent Solenoid Control

11

--

--

Not Used

12

OG/BK

1057

Low Reference

13-14

--

--

Not Used

15

PU

1807

Class 2 Serial Data (Primary)

16-17

--

--

Not Used

18

BN

4

Accessory Voltage

19

PK

639

Ignition 1 Voltage

20

RD/WH

540

Battery Positive Voltage

21

--

--

Not Used

22

BN

818

Vehicle Speed Signal

23

YE

447

Starter Relay Coil Control

24

BN

5069

Main Relay 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

WH

17

Stop Lamp Switch Signal

33

D-GN/WH

459

A/C Compressor Clutch Relay Control

34-36

--

--

Not Used

37

D-GN/WH

465

Fuel Pump Relay Control High

38-42

--

--

Not Used

43

PU

1589

Fuel Level Sensor Signal

44

--

--

Not Used

45

PU

5526

Tap Up/Tap Down Switch Signal

46-47

--

--

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

705

5-Volt Reference A

54-56

--

--

Not Used

Powertrain Control Module (PCM) C2


Object Number: 1335545  Size: CH

Connector Part Information

  • OEM: 15430226
  • Service: 88953274
  • Description: 73-Way F Micro-Pack 64 Series Sealed (BK)

Powertrain Control Module (PCM) C2

Pin

Wire Color

Circuit No.

Function

1

BN

1456

EGR Valve Position Signal

2

OG/BK

1061

UART Serial Data (Secondary)

3

TN

800

UART Serial Data (Primary)

4

PK/BK

1746

Fuel Injector 3 Control

5

TN

1744

Fuel Injector 1 Control

6

L-GN/BK

1745

Fuel Injector 2 Control

7

TN/WH

845

Fuel Injector 5 Control

8

TN

2753

Low Reference

9

YE/BK

846

Fuel Injector 6 Control

10

L-BU/BK

844

Fuel Injector 4 Control

11

OG/WH

2122

IC 2 Control

12

GY/WH

3113

HO2S Heater Low Control (Bank 1 Sensor 1)

13

OG

1676

EGR Solenoid High Control

14

--

--

Not Used

15

PU

574

Low Reference

16

GY

435

EGR Solenoid Low Control

17

--

--

Not Used

18

L-GN

432

MAP Sensor Signal

19-20

--

--

Not Used

21

OG

631

12-Volt Reference

22

L-GN

1867

12-Volt Reference

23-24

--

--

Not Used

25

TN/WH

3211

HO2S Low Reference (Bank 2 Sensor 1)

26

BN/WH

633

CMP Sensor Signal

27

L-BU/BK

647

Medium Resolution Engine Speed Signal

28-29

--

--

Not Used

30

OG/BK

469

Low Reference

31

--

--

Not Used

32

PK/BK

632

Low Reference

33

GY

5047

5-Volt Reference

34

GY

2704

5-Volt Reference A

35

--

--

Not Used

36

GY

2303

Low Reference

37

YE

2174

Low Reference

38

D-BU

496

Knock Sensor 1 Signal

39

GY/BK

1798

Drain Wire

40

GY

1716

Low Reference

41

D-GN/WH

428

EVAP Canister Purge Solenoid Control

42-46

--

--

Not Used

47

TN/WH

3111

HO2S Low Reference (Bank 1 Sensor 1)

48

PU/WH

3110

HO2S Reference Voltage (Bank 1 Sensor 1)

49-52

--

--

Not Used

53

OG

225

Generator Turn On Signal

54

L-BU

1876

Knock Sensor 2 Signal

55

YE

410

ECT Sensor Signal

56

OG/BK

645

Drain Wire

57

TN/BK

231

Oil Pressure Switch Signal

58-59

--

--

Not Used

60

PU/WH

3210

HO2S Reference Voltage (Bank 2 Sensor 1)

61

PU

2121

IC 1 Control

62

L-GN

3212

HO2S Heater Low Control (Bank 2 Sensor 1)

63

L-BU

2123

IC 3 Control

64-72

--

--

Not Used

73

BK/WH

451

Ground

Powertrain Control Module (PCM) C3


Object Number: 1335548  Size: CH

Connector Part Information

  • OEM: 15430211
  • Service: 88953347
  • Description: 56-Way F Micro-Pack 64 Series Sealed (GY)

Powertrain Control Module (PCM) C3

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Used

3

TN

3221

HO2S Low Signal (Bank 2 Sensor 2)

4

TN/WH

3121

HO2S Low Signal (Bank 1 Sensor 2)

5

YE/BK

1227

TFT Sensor Signal

6

YE

492

MAF Sensor Signal

7

--

--

Not Used

8

GY/WH

3122

HO2S Heater Low Control (Bank 1 Sensor 2)

9

--

--

Not Used

10

OG/WH

3223

HO2S Heater Low Control (Bank 2 Sensor 2)

11

OG/BK

1230

A/T ISS High Signal

12

YE

400

VSS High Signal

13-14

--

--

Not Used

15

GY

773

Transmission Range Switch Signal C

16-17

--

--

Not Used

18

PU

3220

HO2S High Signal (Bank 2 Sensor 2)

19

PU

3120

HO2S High Signal (Bank 1 Sensor 2)

20-21

--

--

Not Used

22

YE

772

Transmission Range Switch Signal B

23

WH

776

Transmission Range Switch Signal P

24

YE

657

TCC Release Switch Signal

25

--

--

Not Used

26

TN

472

IAT Sensor Signal

27-28

--

--

Not Used

29

D-BU

1225

Transmission Fluid Pressure Switch Signal B

30

OG

1226

Transmission Fluid Pressure Switch Signal C

31-32

--

--

Not Used

33

L-GN

1222

1-2 Shift Solenoid Valve Control

34

TN/WH

771

Transmission Range Switch Signal A

35-38

--

--

Not Used

39

BN

418

TCC PWM Solenoid Valve Control

40-43

--

--

Not Used

44

PU

401

VSS Low Signal

45

--

--

Not Used

46

YE/BK

1223

2-3 Shift Solenoid Valve Control

47

OG/BK

1228

PC Solenoid Valve High Control (Sol. A)

48

TN

2762

Low Reference

49

D-BU/WH

1231

A/T ISS Low Signal

50

TN/BK

2760

Low Reference

51

L-BU/WH

1229

PC Solenoid Valve Low Control (Sol. A)

52-56

--

--

Not Used