GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module Connector C1 (Blue) End View


Object Number: 15026  Size: CF

Connector Part Information

    • Blue PCM Connector C1
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PPL/WHT

1572

2nd Gear Start Indicator (4L60E only)

3

--

--

Not Used

4

LT GRN

1222

1 - 2 Shift Solenoid Control

5

DK BLU

473

Cooling Fan 2 and 3 Control

6

DK GRN

335

Cooling Fan Relay 1 Control

7

BLK

630

Camshaft Position Sensor Signal

8

PPL/WHT

430

3X Reference

9

LT BLU/BLK

647

18X Reference

10-11

--

--

Not Used

12

BRN

718

ECT Sensor Ground

13

ORN/BLK

469

MAP Sensor Ground

14

ORN/BLK

1061

TAC Serial Data

15

TAN

800

TAC Serial Data

16

BLK/WHT

451

PCM Ground

17

PPL

719

IAT Sensor Ground

18

--

--

Not Used

19

PNK

439

PCM Ignition Feed

20

ORN

340

PCM Battery Feed

21

--

--

Not Used

22

PNK

1224

Transmission Range A Input (4L60E only)

23-26

--

--

Not Used

27

TAN/WHT

1653

Bank 1 HO2S 1 Low

28

GRY

1981

Bank 1 HO2S 3 Low

29

TAN

1667

Bank 2 HO2S 1 Low

30

PPL

420

TCC Brake Switch Signal (4L60E only)

31

BLK

552

Sensor Ground (EGR)

32

GRY

435

EGR Valve Ground

33

DK/BLU

496

Bank 1 Knock Sensor Signal

34

LT/BLU

1876

Bank 2 Knock Sensor Signal

35-42

--

--

Not Used

43

YEL/BLK

846

Injector Control Cylinder #6

44

YEL/BLK

1223

2 - 3 Shift Solenoid Control (4L60E only)

45

--

--

Not Used

46

LT BLU/BLK

844

Injector Control Cylinder #4

47

BLK/WHT

845

Injector Control Cylinder #5

48

RED/BLK

453

Reference Low

49-52

--

--

Not Used

53

TAN/BLK

424

Bypass

54

WHT

423

Ignition Control (IC)

55

DK GRN/WHT

817

VSS Output

56

BLK/WHT

451

PCM Ground

57

BLK/WHT

451

PCM Ground

58

--

--

Not Used

59

DK GRN

1049

Class 2 Serial Data

60

BLK/WHT

451

PCM Ground

61-63

--

--

Not Used

64

YEL

400

VSS High

65

PPL

401

VSS Low

66-68

--

--

Not Used

69

YEL

492

Mass Air Flow Signal

70

DK BLU

229

Theft Deterrent Fuel Enable

71

ORG/BLK

463

Requested Torque Input

72

--

--

Not Used

73

LT GRN/BLK

1745

Injector Control Cylinder #2

74-75

--

--

Not Used

76

DK GRN/WHT

428

EVAP Canister Purge Control

77-78

--

--

Not Used

79

BLK

1744

Injector Control Cylinder #1

80

--

--

Not Used

Powertrain Control Module Connector C2 (Clear) End View


Object Number: 15026  Size: CF

Connector Part Information

    • Clear PCM Connector C2
    • 80 Pin Connector

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

WHT

1310

EVAP Canister Vent Valve Control

3

DK GRN/WHT

465

Fuel Pump Relay Control

4

LT BLU

697

EGR Valve Control

5

BRN/WHT

419

MIL Control

6-7

--

--

Not Used

8

WHT

121

Engine Speed Output

9

TAN/BLK

464

Delivered Torque Output

10

PPL

1666

Bank 2 HO2S 1 Signal

11

DK BLU

1980

Bank 1 HO2S 3 Signal

12

PPL/WHT

1665

Bank 1 HO2S 1 Signal

13-15

--

--

Not Used

16

ORN/BLK

434

PNP Switch Signal

17

RED

1226

Transmission Range C Input (4L60E only)

18

GRY

48

Cruise Control/Clutch Anticipate Switch

19-20

--

--

Not Used

21

BRN/WHT

1571

2nd Gear Start Signal

22

DK GRN/WHT

762

A/C Request Signal

23

PPL/WHT

1035

Crank Signal

24

BRN

86

Cruise Control Release Signal

25

LT GRN

432

MAP Sensor Signal

26

YEL

410

ECT Sensor Signal

27

RED/BLK

380

A/C Refrigerant Pressure Sensor Signal

28

BRN

1456

EGR Pintle Position Signal

29-32

--

--

Not Used

33

GRY

598

5 Volt Reference A

34

LT BLU/BLK

1688

5 Volt Reference B

35

GRY

720

A/C Refrigerant Pressure Sensor Ground

36-38

--

--

Not Used

39

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

40-41

--

--

Not Used

42

PNK/BLK

1746

Injector Control Cylinder #3

43-44

--

--

Not Used

45

RED/BLK

1228

Pressure Control Solenoid High (4L60E only)

46

LT BLU/WHT

1229

Pressure Control Solenoid Low (4L60E only)

47

--

--

Not Used

48

WHT

687

3-2 Shift Solenoid Control (4L60E only)

49

--

--

Not Used

50

TAN

472

Intake Air Temperature Sensor Signal

51-54

--

--

Not Used

55

DK GRN

890

Fuel Tank Pressure Sensor Signal

56

--

--

Not Used

57

DK BLU

1225

Transmission Range B Input (4L60E only)

58

BRN

1174

Engine Oil Level Switch Signal

59-60

--

--

Not Used

61

RED

225

Generator Control

62-67

--

--

Not Used

68

YEL/BLK

1227

Transaxle Fluid Temperature Sensor (4L60E only)

69

PPL

1589

Fuel Level Signal

70-75

--

--

Not Used

76

DK GRN

625

Starter Enable (If Equipped)

77

--

--

Not Used

78

BRN

418

TCC PWM Solenoid Control (4L60E only)

79

TAN/BLK

422

TCC Enable Solenoid Control (4L60E only)

80

--

--

Not Used