GM Service Manual Online
For 1990-2009 cars
Table 1: Accelerator Pedal Position (APP) Sensor
Table 2: Camshaft Position (CMP) Sensor
Table 3: Clutch Pedal Position (CPP) Switch
Table 4: Clutch Switch
Table 5: Crankshaft Position (CKP) Sensor
Table 6: Engine Coolant Temperature (ECT) Sensor
Table 7: Engine Oil Pressure (EOP) Sensor
Table 8: Evaporative Emission (EVAP) Canister Purge Solenoid
Table 9: FAST IDLE Indicator
Table 10: FAST IDLE Switch
Table 11: Fuel Pump and Sender Assembly
Table 12: Fuel Sender and Balance Pump Control Module
Table 13: Fuel Sender and Balance Pump Control Relay
Table 14: Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
Table 15: Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
Table 16: Ignition Coils
Table 17: Ignition Relay -- Engine Controls
Table 18: Manifold Absolute Pressure (MAP) Sensor
Table 19: Mass Air Flow (MAF) Sensor
Table 20: Multifunction Alarm Module
Table 21: Multiport Fuel Injectors
Table 22: Neutral Safety Switch
Table 23: Park/Neutral Position (PNP) Switch C1
Table 24: Park/Neutral Position (PNP) Switch C2
Table 25: PTO Switch
Table 26: Stop Lamp Switch Interface Module
Table 27: Throttle Actuator Control (TAC) Module C1
Table 28: Throttle Actuator Control (TAC) Module C2
Table 29: Throttle Actuator Control (TAC) Motor
Table 30: Throttle Position (TP) Sensor
Table 31: Upfitter Power Takeoff Connector
Table 32: Vehicle Speed Sensor (VSS) -- Automatic Transmission
Table 33: Vehicle Speed Sensor (VSS) -- Manual Transmission

Accelerator Pedal Position (APP) Sensor


Object Number: 666638  Size: CH

Connector Part Information

    • 12177081
    • 10 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

1271

Low Reference

B

PPL

1272

Low Reference

C

LT BLU

1162

APP Sensor 2 Signal

D

TAN

1274

5 Volt Reference

E

YEL/BLK

1275

5 Volt Reference

F

DK BLU

1161

APP Sensor 1 Signal

G

WHT/BLK

1164

5 Volt Reference

H

--

--

Not Used

J

GRY

1273

Low Reference

K

DK GRN

1163

APP Sensor 3 Signal

Camshaft Position (CMP) Sensor


Object Number: 516611  Size: CH

Connector Part Information

    • 12059595
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

RED

631

12 Volt Reference

B

PNK/BLK

632

Low Reference

C

BRN/WHT

633

CMP Sensor Signal

Clutch Pedal Position (CPP) Switch


Object Number: 309396  Size: CH

Connector Part Information

    • 12064870
    • 2 Way M Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

PNK

39

Ignition 1 Voltage

B

BRN/WHT

379

CPP Switch Signal

Clutch Switch


Object Number: 35456  Size: CH

Connector Part Information

    • 12064749
    • 2 Way F Metri-Pack 480 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

48

CPP Switch Signal

B

PPL

806

Crank Voltage

Crankshaft Position (CKP) Sensor


Object Number: 516611  Size: CH

Connector Part Information

    • 12059595
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1867

12 Volt Reference

B

YEL/BLK

1868

Low Reference

C

DK BLU/WHT

1869

CKP Sensor Signal

Engine Coolant Temperature (ECT) Sensor


Object Number: 68730  Size: CH

Connector Part Information

    • 12110293
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

720

Low Reference

B

YEL

410

ECT Sensor Signal

C

DK GRN

135

Coolant Temperature Sensor Signal

Engine Oil Pressure (EOP) Sensor


Object Number: 258299  Size: CH

Connector Part Information

    • 12078090
    • 3 Way F Metri-Pack 150 Series, Sealed P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

407

Low Reference

B

GRY

705

5 Volt Reference

C

TAN/WHT

332

Oil Pressure Sensor Signal

Evaporative Emission (EVAP) Canister Purge Solenoid


Object Number: 35437  Size: CH

Connector Part Information

    • 12052643
    • 2 Way F Metri-Pack 150 Series, Sealed (RED)

Pin

Wire Color

Circuit No.

Function

A

PNK

339

Ignition 1 Voltage

B

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

FAST IDLE Indicator


Object Number: 258301  Size: CH

Connector Part Information

    • 12059254
    • 2 Way M, Metri-Pack 150 Series (GRN)

Pin

Wire Color

Circuit No.

Function

A

PNK

39

Ignition 1 Voltage

B

RED

2013

High Idle Indicator Control

FAST IDLE Switch


Object Number: 95782  Size: CH

Connector Part Information

    • 12052833
    • 2 Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

534

High Idle Switch Output

B

BLK/WHT

451

Ground

Fuel Pump and Sender Assembly


Object Number: 223139  Size: CH

Connector Part Information

    • 12162188
    • 4 Way F, Metri-Pack 150 Series, Sealed, (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B

--

--

Not Used

C

GRY

120

Fuel Pump Motor Feed

C

RED

458

Fuel Pump Relay Output-Normally Open Contact - Right Fuel Tank

D

DK BLU

1936

Fuel Gage Sensor Signal-Left - Left Fuel Tank

D

LT BLU

1937

Fuel Gauge Sensor Signal-Right - Right Fuel Tank

D

PPL

30

Fuel Level Sensor Signal - Single Fuel Tank

Fuel Sender and Balance Pump Control Module


Object Number: 535933  Size: CH

Connector Part Information

    • 12059573
    • 6 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

341

Ignition 3 Voltage

B

LT BLU

1937

Fuel Level Sensor Signal-Right

C

DK BLU

1936

Fuel Level Sensor Signal-Left

D

LT GRN

497

Fuel Pump Relay Control

E

BLK

350

Ground

F

PPL

30

Fuel Level Sensor Signal

Fuel Sender and Balance Pump Control Relay


Object Number: 535912  Size: CH

Connector Part Information

    • 12129716
    • 4 Way F, Metri-Pack 280 Series, Flexlock, Sealed, (GRY)

Pin

Wire Color

Circuit No.

Function

30

BRN

341

Ignition 3 Voltage

85

GRY

120

Fuel Pump Supply Voltage

86

LT GRN

497

Fuel Pump Relay Control

87

RED

458

Fuel Pump Relay Output-Normally Open Contact

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1


Object Number: 628099  Size: CH

Connector Part Information

    • 12092840
    • 5 Way M Metri-Pack 150 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN

413

HO2S Low Signal

B

PPL/WHT

1665

HO2S High Signal

C

--

--

Not Used

D

LT GRN/WHT

3213

Heater Power

E

LT GRN

3212

Heater Ground

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1


Object Number: 655691  Size: CH

Connector Part Information

    • 12146046
    • 5 Way F Metri-Pack 150 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN

413

HO2S Low Signal

B

PPL

1666

HO2S High Signal

C

--

--

Not Used

D

LT GRN/WHT

3213

Heater Power

E

LT GRN

3212

Heater Ground

Ignition Coils


Object Number: 320619  Size: CH

Connector Part Information

    • 12162144
    • 4 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

650

Ground

B

BRN

2129

Low Reference - Bank 1-Left

B

BRN

2130

Low Reference - Bank 2-Right

C

PPL

2121

IC 1 Control - Ignition Coil 1

C

RED

2122

IC 2 Control - Ignition Coil 2

C

LT BLU

2123

IC 3 Control - Ignition Coil 3

C

DK GRN

2124

IC 4 Control - Ignition Coil 4

C

DK GRN

2125

IC 5 Control - Ignition Coil 5

C

LT BLU

2126

IC 6 Control - Ignition Coil 6

C

RED

2127

IC 7 Control - Ignition Coil 7

C

PPL

2128

IC 8 Control - Ignition Coil 8

D

PNK

139

Ignition 1 Voltage - Bank 1-Left

D

PNK

239

Ignition 1 Voltage - Bank 2-Right

Ignition Relay -- Engine Controls


Object Number: 68749  Size: CH

Connector Part Information

    • 12124169
    • 4 Way F Metri-Pack Mixed Series (BLK)

Pin

Wire Color

Circuit No.

Function

30

RED

42

Battery Positive Voltage

85

PNK

39

Ignition 1 Voltage

86

BLK

150

Ground

87

PPL

2000

Ignition 1 Relay Output-Normally Open Contact

Manifold Absolute Pressure (MAP) Sensor


Object Number: 68740  Size: CH

Connector Part Information

    • 12129946
    • 3 Way F Metri-Pack 150 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN/BLK

469

Low Reference

B

LT GRN

432

MAP Sensor Signal

C

GRY

597

5 Volt Reference

Mass Air Flow (MAF) Sensor


Object Number: 366067  Size: CH

Connector Part Information

    • 15305555
    • 5 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

552

Low Reference

B

TAN

472

IAT Sensor Signal

C

BLK/WHT

451

Ground

D

PNK

339

Ignition 1 Voltage

E

YEL

492

MAF Sensor Signal

Multifunction Alarm Module


Object Number: 73152  Size: CH

Connector Part Information

    • 12110259
    • 16 Way F Micro-Pack 100 Series (GRN)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

LT BLU

1377

Check Gages Indicator Control

A3

LT GRN

1478

Coolant Level Switch Signal

A4

LT BLU/BLK

1928

Brake Booster Fluid Flow Switch Signal (JE3)

A4

--

--

Not Used (JE5)

A5

GRY

847

Extended Travel Brake Switch Signal (JE3)

A5

--

--

Not Used (JE5)

A6

PNK

39

Ignition 1 Voltage

A7

WHT

17

Stop Lamp Switch Signal (JE3)

A7

--

--

Not Used (JE5)

A8

ORN

1740

Battery Positive Voltage (JE3)

A8

--

--

Not Used (JE5)

B1

YEL/BLK

68

Low Coolant Level Indicator Control

B2

TAN/WHT

33

Brake Warning Indicator Control (JE3)

B2

--

--

Not Used (JE5)

B3

YEL/BLK

1471

Brake Warning Indicator Supply Voltage 2 (JE3)

B3

--

--

Not Used (JE5)

B4

BLK

150

Ground

B5

--

--

Not Used (JE3)

B5

TAN/WHT

33

Brake Warning Indicator Control (JE5)

B6

PPL

806

Crank Voltage

B7

YEL

53

Fuse Output-Generator-Tachometer Pulse

B8

DK BLU

527

Engine Shutdown Alarm Signal

Multiport Fuel Injectors


Object Number: 366123  Size: CH

Connector Part Information

    • 15326181
    • 2 Way F Micro-Pack Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

139

Ignition 1 Voltage (Bank 1-Left)

A

PNK

139

Ignition 1 Voltage - Bank 2-Right

B

BLK

1744

Fuel Injector 1 Control - Multiport Fuel Injector 1

B

LT GRN/BLK

1745

Fuel Injector 2 Control - Multiport Fuel Injector 2

B

PNK/BLK

1746

Fuel Injector 3 Control - Multiport Fuel Injector 3

B

LT BLU/BLK

844

Fuel Injector 4 Control - Multiport Fuel Injector 4

B

BLK/WHT

845

Fuel Injector 5 Control - Multiport Fuel Injector 5

B

YEL/BLK

846

Fuel Injector 6 Control - Multiport Fuel Injector 6

B

RED/BLK

877

Fuel Injector 7 Control - Multiport Fuel Injector 7

B

DK BLU/WHT

878

Fuel Injector 8 Control - Multiport Fuel Injector 8

Neutral Safety Switch


Object Number: 38554  Size: CH

Connector Part Information

    • 12124819
    • 2 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

806

Crank Voltage

B

ORN/BLK

434

Neutral Safety Switch Signal

Park/Neutral Position (PNP) Switch C1


Object Number: 309512  Size: CH

Connector Part Information

    • 02962793
    • 1 Way F 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN/WHT

1932

Transmission Shift Select Switch - Park Signal

Park/Neutral Position (PNP) Switch C2


Object Number: 309502  Size: CH

Connector Part Information

    • 02973407
    • 2 Way F 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

1933

Transmission Shift Select Switch - Park Low Reference

B

--

--

Not Used

PTO Switch


Object Number: 68730  Size: CH

Connector Part Information

    • 12047782
    • 3 Way M Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

39

Ignition 1 Voltage

B

LT GRN

488

PTO Enable Switch Input

C

BLK/WHT

451

PCM Ground

Stop Lamp Switch Interface Module


Object Number: 403569  Size: CH

Connector Part Information

    • 12004706
    • 6 Way Edgeboard Series, Standard (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

39

Ignition 1 Voltage

B

PPL

420

TCC Brake Switch Signal

C

TAN

848

Brake Switch Signal

D

WHT

17

Stop Lamp Switch Signal

E

BLK/WHT

451

Ground

F

LT GRN

526

Stop Lamp Switch Signal

Throttle Actuator Control (TAC) Module C1


Object Number: 666638  Size: CH

Connector Part Information

    • 12177081
    • 10 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

1271

Low Reference

B

PPL

1272

Low Reference

C

LT BLU

1162

APP Sensor 2 Signal

D

TAN

1274

5 Volt Reference

E

YEL/BLK

1275

5 Volt Reference

F

DK BLU

1161

APP Sensor 1 Signal

G

WHT/BLK

1164

5 Volt Reference

H

--

--

Not Used

J

GRY

1273

Low Reference

K

DK GRN

1163

APP Sensor 3 Signal

Throttle Actuator Control (TAC) Module C2


Object Number: 261930  Size: CH

Connector Part Information

    • 12191065
    • 16 Way F Micro-Pack 100W Series (NAT)

Pin

Wire Color

Circuit No.

Function

1

DK GRN

485

TP Sensor 1 Signal

2

GRY

416

5 Volt Reference

3

BRN

452

Low Reference

4

DK BLU

84

Cruise Control Set/Coast Switch Signal

5

GRY/BLK

87

Cruise Control Resume/Accel Switch Signal

6

LT GRN

526

Stop Lamp Switch Signal

7

PNK

339

Ignition 1 Voltage

8

BRN

582

TAC Motor Control-2

9

LT BLU/BLK

1688

5 Volt Reference

10

BLK/WHT

1704

Low Reference

11

PPL

486

TP Sensor 2 Signal

12

ORN/BLK

1061

UART Serial Data - Secondary

13

DK BLU/WHT

774

UART Serial Data - Tertiary

14

GRY

397

Cruise Control On Switch Signal

15

BLK/WHT

451

Ground

16

YEL

581

TAC Motor Control-1

Throttle Actuator Control (TAC) Motor


Object Number: 35437  Size: CH

Connector Part Information

    • 12077900
    • 2 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

582

TAC Motor Control-2

B

YEL

581

TAC Motor Control-1

Throttle Position (TP) Sensor


Object Number: 40442  Size: CH

Connector Part Information

    • 12162260
    • 6 Way F Metri-Pack 150.2 Series, Sealed P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

416

5 Volt Reference

B

BLK

452

Low Reference

C

DK GRN

485

TP Sensor 1 Signal

D

LT BLU/BLK

1688

5 Volt Reference

E

BLK/WHT

1704

Low Reference

F

PPL

486

TP Sensor 2 Signal

Upfitter Power Takeoff Connector


Object Number: 524196  Size: CH

Connector Part Information

    • 12047937
    • 8 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

451

Ground

B

GRY/BLK

87

Cruise Control Resume/Accel Switch Signal

C

DK BLU

84

Cruise Control Set/Coast Switch Signal

D

LT GRN

488

PTO Enable Switch Input

E

--

--

Not Used

F

PPL

2562

PTO Relay Output-Coil

G

--

--

Not Used

H

LT BLU

494

PTO Switch Output

Vehicle Speed Sensor (VSS) -- Automatic Transmission


Object Number: 35437  Size: CH

Connector Part Information

    • 12052644
    • 2 Way F Metri-Pack 150 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

PPL/WHT

821

VSS High Signal

B

LT GRN/BLK

822

VSS Low Signal

Vehicle Speed Sensor (VSS) -- Manual Transmission


Object Number: 237066  Size: CH

Connector Part Information

    • 12162194
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL/WHT

821

VSS High Signal

B

LT GRN/BLK

822

VSS Low Signal