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: 15497530
  • Service: 88953346
  • Description: 56-Way F Micro-Pack (BU)

Terminal Part Information

  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-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 1

5

--

--

Not Used

6

BN/WH

419

MIL Control

7

YE/GY

5514

Low Reference

8

TN

2759

Low Reference

9

--

--

Not Used

10

TN/WH

1310

EVAP Canister Vent Solenoid Control

11

--

--

Not Used

12

WH/GY

6786

Low Reference

13-17

--

--

Not Used

18

D-BU/WH

5985

Accessory Wake up Serial Data

19

PK

439

Ignition 1 Voltage

20

RD/WH

4640

Battery Positive Voltage

21

--

--

Not Used

22

PU/BK

389

Vehicle Speed Signal

23

YE

447

Starter Relay Coil Control

24

BN

5069

PWRTRAIN Relay Control

25

--

--

Not Used

26

D-GN

890

Fuel Tank Pressure Sensor Signal

27-30

--

--

Not Used

31

OG/WH

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

38-42

--

--

Not Used

43

PU/BK

1589

Primary Fuel Level Sensor Signal

44-47

--

--

Not Used

48

TN/OG

335

Low Speed Cooling Fan Relay Control

49

--

--

Not Used

50

L-BU

473

High Speed Cooling Fan Relay Control

51-52

--

--

Not Used

53

GY

416

5-Volt Reference 1

54-56

--

--

Not Used

Powertrain Control Module (PCM) C2


Object Number: 1524159  Size: CH

Connector Part Information

  • OEM: 15497526
  • Service: See 88953274
  • Description: 73-Way F Micro-Pack (BK)

Terminal Part Information

  • Pins: 1-13,16,18,26-31,33,34,37,41,45-48,53,55,57,58,61
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: 15392777/23
  • Core/Insulation Crimp D/5
  • Release Tool/Test Probe: 15315247 J-35616-4A (PU)

Powertrain Control Module (PCM) C2

Pin

Wire Color

Circuit No.

Function

1

PK/YE

1456

EGR Valve Position Signal

2

WH/BK

1061

UART Serial Data Secondary

3

TN/OG

800

UART Serial Data Primary

4

TN/PK

845

Fuel Injector 5 Control

5

TN/OG

1744

Fuel Injector 1 Control

6

YE/BK

846

Fuel Injector 6 Control

7

PK/BK

1746

Fuel Injector 3 Control

8

TN/D-GN

2753

Low Reference

9

L-GN/BK

1745

Fuel Injector 2 Control

10

YE/BK

844

Fuel Injector 4 Control

11

PU/WH

424

IC Timing Signal

12

GY

3112

HO2S Heater Low Control Sensor 1 (Early Production)

WH

3112

HO2S Heater Low Control Sensor 1 (Late Production)

13

OG/WH

1676

EGR Solenoid High Control

14-15

--

--

Not Used

16

D-GN

435

EGR Solenoid Low Control

17

--

--

Not Used

18

YE/GY

469

MAP Sensor Signal

19-25

--

--

Not Used

26

TN/YE

630

Camshaft Position Signal

27

PU/WH

430

Low Resolution Engine Speed Signal

28

L-BU/BK

647

Medium Resolution Engine Speed Signal

29

TN/L-BU

2761

Low Reference

30

L-GN

432

Low Reference

31

BN

1174

Oil Level Switch Signal

32

--

--

Not Used

33

GY/BK

2702

5-Volt Reference 1

34

OG/WH

2704

5-Volt Reference 2

35-36

--

--

Not Used

37

OG/BK

453

Low Reference

38-40

--

--

Not Used

41

D-GN/WH

428

EVAP Canister Purge Solenoid Control

42-44

--

--

Not Used

45

GY/WH

23

Generator Field Duty Cycle Signal

46

D-BU

496

Knock Sensor Signal 1

47

TN/PK

3111

HO2S Low Reference Sensor 1

48

PU/WH

3110

HO2S Reference Voltage Sensor 1

49-52

--

--

Not Used

53

OG

225

Generator Turn On Signal

54

--

--

Not Used

55

YE

410

ECT Sensor Signal

56

--

--

Not Used

57

TN/BK

231

Oil Pressure Switch Signal

58

L-BU

1876

Knock Sensor 2 Signal

59-60

--

--

Not Used

61

WH

423

IC Timing Control

62-72

--

--

Not Used

73

BK/WH

1551

Ground

Powertrain Control Module (PCM) C3


Object Number: 1524164  Size: CH

Connector Part Information

  • OEM: 15497528
  • Service: 88953347
  • Description: 56-Way F Micro-Pack (GY)

Terminal Part Information

  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Powertrain Control Module (PCM) C3

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Used

4

TN/PK

3121

HO2S 2 Low Signal

5

D-GN

1227

TFT Sensor Signal

6

RD/YE

492

MAF Sensor Signal

7

--

--

Not Used

8

GY/WH

3122

HO2S 2 Heater Low Control

9-10

--

--

Not Used

11

OG/BK

1230

AT ISS High Signal

12

PK/YE

400

VSS Signal High

13-14

--

--

Not Used

15

GY

773

Transmission Range Switch Signal C

16-18

--

--

Not Used

19

PU

3120

HO2S 2 High Signal

20

--

--

Not Used

21

L-GN

1652

Reverse Lockout Solenoid Control

22

YE

772

Transmission Range Switch Signal B

23

WH/BK

776

Transmission Range Switch Signal P

24

WH/BK

1804

TCC Release Switch Signal

25

--

--

Not Used

26

TN

472

IAT Sensor Signal

27-32

--

--

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

TN/BK

422

TCC Solenoid Valve Control

40-43

--

--

Not Used

44

PU

401

VSS Signal Low

45

--

--

Not Used

46

OG

1223

2-3 Shift Solenoid Valve Control

47

OG/WH

1228

PC Solenoid Valve High Control

48

TN/OG

452

Low Reference

49

D-BU/WH

1231

AT ISS Low Signal

50

TN/D-BU

2760

Low Reference

51

L-BU/WH

1229

PC Solenoid Valve Low Control

52-56

--

--

Not Used