GM Service Manual Online
For 1990-2009 cars only
Table 1: Accelerator Pedal Position (APP) Sensor
Table 2: Barometric Pressure (BARO) Sensor
Table 3: Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2
Table 4: Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2
Table 5: Camshaft Position (CMP) Sensor - Exhaust Bank 1
Table 6: Camshaft Position (CMP) Sensor - Exhaust Bank 2
Table 7: Camshaft Position (CMP) Sensor - Intake Bank 1
Table 8: Camshaft Position (CMP) Sensor - Intake Bank 2
Table 9: Crankshaft Position (CKP) Sensor
Table 10: Engine Coolant Temperature (ECT) Sensor
Table 11: Evaporative Emission (EVAP) Canister Purge Solenoid Valve
Table 12: Evaporative Emission (EVAP) Canister Vent Solenoid
Table 13: Fuel Injector 1
Table 14: Fuel Injector 2
Table 15: Fuel Injector 3
Table 16: Fuel Injector 4
Table 17: Fuel Injector 5
Table 18: Fuel Injector 6
Table 19: Fuel Pump and Sender Assembly
Table 20: Fuel Tank Pressure (FTP) Sensor
Table 21: Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
Table 22: Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
Table 23: Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
Table 24: Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
Table 25: Ignition Coil 1
Table 26: Ignition Coil 2
Table 27: Ignition Coil 3
Table 28: Ignition Coil 4
Table 29: Ignition Coil 5
Table 30: Ignition Coil 6
Table 31: Intake Manifold Runner Control (IMRC) Solenoid
Table 32: Knock Sensor (KS) Bank 1
Table 33: Knock Sensor (KS) Bank 2
Table 34: MAF/IAT Sensor
Table 35: Secondary Fuel Sender Assembly
Table 36: Throttle Body Assembly

Accelerator Pedal Position (APP) Sensor


Object Number: 632357  Size: CH

Accelerator Pedal Position (APP) Sensor

Pin

Wire

Circuit

Function

A

PU

1272

Accelerator Pedal Position Low Reference (2)

B

L-BU

1162

Accelerator Pedal Position Signal (2)

C

TN

1274

Accelerator Pedal Position 5-Volt Reference (2)

D

BN

1271

Accelerator Pedal Position Low Reference (1)

E

D-BU

1161

Accelerator Pedal Position Signal (1)

F

WH/BK

1164

Accelerator Pedal Position 5-Volt Reference (1)

Barometric Pressure (BARO) Sensor


Object Number: 1331443  Size: CH

Barometric Pressure (BARO) Sensor

Pin

Wire

Circuit

Function

1

GY

605

Reference Voltage Feed - 5-Volt Reference

2

TN

470

Sensor Return

3

L-GN

432

Manifold Absolute Pressure Sensor Signal

Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 1


Object Number: 1331453  Size: CH

Pin

Wire

Circuit

Function

1

PK/BK

5293

Engine Main Relay Fused Control (4)

2

L-GN

5282

Camshaft Phaser Exhaust Solenoid (1)

Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2


Object Number: 1331453  Size: CH

Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2

Pin

Wire

Circuit

Function

1

PK/BK

5293

Engine Main Relay Fused Control (4)

2

WH/BK

5283

Camshaft Phaser Exhaust Solenoid (2)

Camshaft Position (CMP) Actuator Solenoid - Intake Bank 1


Object Number: 1331453  Size: CH

Pin

Wire

Circuit

Function

1

PK/BK

5293

Engine Main Relay Fused Control (4)

2

PU

5284

Camshaft Phaser Intake Solenoid (1)

Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2


Object Number: 1331453  Size: CH

Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2

Pin

Wire

Circuit

Function

1

PK/BK

5293

Engine Main Relay Fused Control (4)

2

OG/BK

5272

Camshaft Phaser Intake Solenoid (2)

Camshaft Position (CMP) Sensor - Exhaust Bank 1


Object Number: 1331443  Size: CH

Camshaft Position (CMP) Sensor - Exhaust Bank 1

Pin

Wire

Circuit

Function

1

TN

470

Sensor Return

2

D-GN

5273

Camshaft Position Exhaust Sensor (1)

3

GY

705

Reference Voltage Feed - 5-Volt Reference

Camshaft Position (CMP) Sensor - Exhaust Bank 2


Object Number: 1331443  Size: CH

Camshaft Position (CMP) Sensor - Exhaust Bank 2

Pin

Wire

Circuit

Function

1

TN

470

Sensor Return

2

PU

5274

Camshaft Position Exhaust Sensor (2)

3

GY

705

Reference Voltage 5-Volt Reference

Camshaft Position (CMP) Sensor - Intake Bank 1


Object Number: 1331443  Size: CH

Camshaft Position (CMP) Sensor - Intake Bank 1

Pin

Wire

Circuit

Function

1

TN

470

Sensor Return

2

OG

5275

Camshaft Position Intake Sensor (1)

3

GY

705

Reference Voltage Feed 5-Volt Reference

Camshaft Position (CMP) Sensor - Intake Bank 2


Object Number: 1331443  Size: CH

Camshaft Position (CMP) Sensor - Intake Bank 2

Pin

Wirer

Circuit

Function

1

TN

470

Sensor Return

2

YE

5276

Camshaft Position Intake Sensor (2)

3

GY

705

Reference Voltage Feed 5-Volt Reference

Crankshaft Position (CKP) Sensor


Object Number: 784092  Size: CH

Crankshaft Position (CKP) Sensor

Pin

Wire

Circuit

Function

1

PU/WH

5024

Engine Speed Sensor Low

2

WH/BK

5039

Engine Speed Sensor High

Engine Coolant Temperature (ECT) Sensor


Object Number: 784092  Size: CH

Engine Coolant Temperature (ECT) Sensor

Pin

Wire

Circuit

Function

1

YE

410

Coolant Temperature Sensor Signal

2

TN

470

Sensor Return

Evaporative Emission (EVAP) Canister Purge Solenoid Valve


Object Number: 1331450  Size: CH

Evaporative Emission (EVAP) Canister Purge Solenoid Valve

Pin

Wire

Circuit

Function

1

PK/BK

5293

Engine Main Relay Fused Control (4)

2

D-GN/WH

428

Canister Purge Solenoid Output

Evaporative Emission (EVAP) Canister Vent Solenoid


Object Number: 684795  Size: CH

Evaporative Emission (EVAP) Canister Vent Solenoid

Pin

Wire

Circuit

Function

A

RD/WH

1540

Fuse Output - Battery - Type III Fuse

B

WH

1310

Canister Purge Solenoid Output

Fuel Injector 1


Object Number: 603098  Size: CH

Fuel Injector 1

Pin

Wire

Circuit

Function

A

PK/BK

5291

Engine Main Relay Fused Control (2)

B

TN

1744

Fuel Injector 1 Output

Fuel Injector 2


Object Number: 603098  Size: CH

Fuel Injector 2

Pin

Wire

Circuit

Function

A

PK/BK

5292

Engine Main Relay Fused Control (3)

B

L-GN/BK

1745

Fuel Injector 2 Output

Fuel Injector 3


Object Number: 603098  Size: CH

Fuel Injector 3

Pin

Wire

Circuit

Function

A

PK/BK

5291

Engine Main Relay Fused Control (2)

B

PK/BK

1746

Fuel Injector 3 Output

Fuel Injector 4


Object Number: 603098  Size: CH

Fuel Injector 4

Pin

Wire

Circuit

Function

A

PK/BK

5292

Engine Main Relay Fused Control (3)

B

L-BU/BK

844

Fuel Injector 4 Output

Fuel Injector 5


Object Number: 603098  Size: CH

Fuel Injector 5

Pin

Wire

Circuit

Function

A

PK/BK

5291

Engine Main Relay Fused Control (2)

B

TN/WH

845

Fuel Injector 5 Output

Fuel Injector 6


Object Number: 603098  Size: CH

Fuel Injector 6

Pin

Wire

Circuit

Function

A

PK/BK

5292

Engine Main Relay Fused Control (3)

B

YE/BK

846

Fuel Injector 6 Output

Fuel Pump and Sender Assembly


Object Number: 456551  Size: CH

Fuel Pump and Sender Assembly

Pin

Wire

Circuit

Function

A

D-BU

1936

Primary Fuel Level Sensor Signal

B

GY

120

Fuel Pump Motor Feed

C

BK

1050

Ground

D

TN

452

Fuel Tank Pressure Sensor Low Reference

Fuel Tank Pressure (FTP) Sensor


Object Number: 516611  Size: CH

Fuel Tank Pressure (FTP) Sensor

Pin

Wire

Circuit

Function

A

TN

452

Sensor Return - Fuel Tank Pressure 1 Sensor

B

D-GN

890

Fuel Tank Pressure Sensor Signal

C

GY

596

Reference Voltage Feed - 5-Volt Reference Fuel Tank Pressure 1 Sensor

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1


Object Number: 1523693  Size: CH

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Pin

Wire

Circuit

Function

1

L-GN

5278

Heated Oxygen Sensor Input Pump Current Bank 1 Sensor

2

TN

1664

HO2S Heater Low Signal - Bank 1 Sensor 1

3

GY/WH

3113

HO2S Heater Low Control - Bank 1 Sensor 1

4

PK/BK

5293

Engine Main Relay Fused Control

5

WH

5279

Output Pump Current

6

PU

1665

HO2S High Signal - Bank 1 Sensor 1

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2


Object Number: 2015666  Size: CH

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

Pin

Wire

Circuit

Function

A

TN/WH

1669

Oxygen Sensor Return - Left - Rear of Catalytic Converter

B

PU/WH

1668

Oxygen Sensor Signal - Left - Rear of Catalytic Converter

C

BK/WH

3122

Oxygen Sensor Heater Control Low - Front

D

PK/BK

5294

Engine Main Relay Fused Control (5)

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1


Object Number: 1523693  Size: CH

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Pin

Wire

Circuit

Function

1

OG

5280

HO2S Input Pump Current - Bank 2 Sensor (1)

2

TN

1667

HO2S High Signal - Bank 2 Sensor 1

3

L-BU

3212

HO2S Heater Low Control - Bank 2 Sensor 1

4

PK/BK

5293

Engine Main Relay Fused Control

5

PU/WH

5281

HO2S Low Signal - Bank 2 Sensor 1 Output Pump Current

6

PU

1666

HO2S High Signal - Bank 2 Sensor 1

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2


Object Number: 2015666  Size: CH

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2

Pin

Wire C

Circuit

Function

A

TN

1671

Oxygen Sensor Return - Right - Rear of Catalytic Converter

B

PU

1670

Oxygen Sensor Signal - Right - Rear of Catalytic Converter

C

OG/WH

3223

Oxygen Sensor Signal - Bank 2 Sensor 2 Heater Control Low

D

PK/BK

5294

Engine Main Relay Fused Control (5)

Ignition Coil 1


Object Number: 1331446  Size: CH

Ignition Coil 1

Pin

Wire

Circuit

Function

1

PU

2121

Electronic Spark Timing Signal Cylinder 1

2

PK/BK

5291

Engine Main Relay Fused Control (2)

3

BK/WH

1551

Ground - Clean

4

BK

1550

Ground

Ignition Coil 2


Object Number: 1331446  Size: CH

Ignition Coil 2

Pin

Wire

Circuit

Function

1

OG/WH

2122

Electronic Spark Timing Signal Cylinder 2

2

PK/BK

5292

Engine Main Relay Fused Control (3)

3

BK/WH

151

Ground - Clean

4

BK

150

Ground

Ignition Coil 3


Object Number: 1331446  Size: CH

Ignition Coil 3

Pin

Wire

Circuit

Function

1

L-BU

2123

Electronic Spark Timing Signal Cylinder 3

2

PK/BK

5291

Engine Main Relay Fused Control (2)

3

BK/WH

1551

Ground - Clean

4

BK

1550

Ground

Ignition Coil 4


Object Number: 1331446  Size: CH

Ignition Coil 4

Pin

Wire

Circuit

Function

1

D-GN/WH

2124

Electronic Spark Timing Signal Cylinder 4

2

PK/BK

5292

Engine Main Relay Fused Control (3)

3

BK/WH

151

Ground - Clean

4

BK

150

Ground

Ignition Coil 5


Object Number: 1331446  Size: CH

Ignition Coil 5

Pin

Wire

Circuit

Function

1

D-GN

2125

Electronic Spark Timing Signal Cylinder 5

2

PK/BK

5291

Engine Main Relay Fused Control (2)

3

BK/WH

1551

Ground - Clean

4

BK

1550

Ground

Ignition Coil 6


Object Number: 1331446  Size: CH

Ignition Coil 6

Pin

Wire

Circuit

Function

1

L-BU/WH

2126

Electronic Spark Timing Signal Cylinder 6

2

PK/BK

5292

Engine Main Relay Fused Control (3)

3

BK/WH

151

Ground - Clean

4

BK

150

Ground

Intake Manifold Runner Control (IMRC) Solenoid


Object Number: 594477  Size: CH

Intake Manifold Runner Control (IMRC) Solenoid

Pin

Wire Color

Circuit No.

Function

A

TN

470

Sensor Low Reference

B

YE

7017

Variable Intake Manifold Position Signal

C

L-BU/WH

5041

Intake Manifold Control

D

BK

1450

Ground

E

PK/BK

5293

Engine Main Relay Fused Control (4)

Knock Sensor (KS) Bank 1


Object Number: 784092  Size: CH

Knock Sensor (KS) Bank 1

Pin

Wire

Circuit

Function

1

D-BU

496

Knock Sensor Signal 1

2

GY

1716

Knock Sensor Return

Knock Sensor (KS) Bank 2


Object Number: 784092  Size: CH

Knock Sensor (KS) Bank 2

Pin

Wire

Circuit

Function

1

L-BU

1876

Knock Sensor Signal 2

2

TN

407

Sensor Return

MAF/IAT Sensor


Object Number: 2015667  Size: CH

MAF/IAT Sensor

Pin

Wire

Circuit

Function

1

TN

472

Manifold Absolute Temperature Sensor Signal

2

PK

439

Run/Crank Ignition 1 Voltage

3

TN

2760

Sensor Return - Induction Air Temperature

4

GY

596

Reference Voltage Feed - 5-Volt Reference

5

YE

492

Mass Air Flow Sensor Signal

Secondary Fuel Sender Assembly


Object Number: 684847  Size: CH

Secondary Fuel Sender Assembly

Pin

Wire

Circuit

Function

A

L-BU

1937

Secondary Fuel Level Sensor Signal

B-C

--

--

Not Used

D

TN

2759

Fuel Tank Pressure Sensor Low Reference

Throttle Body Assembly


Object Number: 1523693  Size: CH

Throttle Body Assembly

Pin

Wire

Circuit

Function

1

D-GN

485

Throttle Position Sensor Signal 1

2

GY

2701

Throttle Position Sensor 5-Volt Reference

3

BN

582

Throttle Actuator Control Close

4

PU

486

Throttle Position Sensor Signal 2

5

YE

581

Throttle Actuator Control Open

6

TN

2752

Throttle Position Sensor Low Reference