GM Service Manual Online
For 1990-2009 cars only
Table 1: Air Pump Motor
Table 2: Air Pump Relay
Table 3: Air Pump Pressure Sensor
Table 4: Air Pump Solenoid Valve
Table 5: Ambient Air Temperature Sensor
Table 6: Back Up Lamp Switch
Table 7: Camshaft Position (CMP) Sensor
Table 8: Camshaft Position (CMP) Actuator Solenoid Valve
Table 9: Circuit Opening Relay
Table 10: Clutch Pedal Position (CPP) Switch
Table 11: Crankshaft Position (CKP) Sensor
Table 12: Engine Coolant Temperature (ECT) Sensor
Table 13: EFI Relay
Table 14: EVAP Pressure Switching Solenoid
Table 15: EVAP Purge Solenoid Valve
Table 16: EVAP Vent Solenoid Valve
Table 17: EVAP ACIS Valve
Table 18: Fuel Injector #1
Table 19: Fuel Injector #2
Table 20: Fuel Injector #3
Table 21: Fuel Injector #4
Table 22: Fuel Sender Assembly
Table 23: Fuel Tank Pressure Sensor
Table 24: Heated Oxygen Sensor (HO2S) 1
Table 25: Heated Oxygen Sensor (HO2S) 2
Table 26: Idle Air Control (IAC) Motor
Table 27: Ignition Coil 1
Table 28: Ignition Coil 2
Table 29: Ignition Coil 3
Table 30: Ignition Coil 4
Table 31: Knock Sensor (KS)
Table 32: Mass Air Flow (MAF) Sensor
Table 33: Noise Filter
Table 34: PCM Connector C1
Table 35: PCM Connector C2
Table 36: PCM Connector C3
Table 37: PCM Connector C4
Table 38: Rocker Arm Oil Control Valve
Table 39: Throttle Position (TP) Sensor
Table 40: Vehicle Speed Sensor (Direct Clutch Speed Sensor)
Table 41: Vehicle Speed Sensor (VSS)

Air Pump Motor


Object Number: 820254  Size: CH

Connector Part Information

    • 90980-10845
    • BLK

Pin

Wire Color

Function

A

BLK/RED

Supply Voltage

B

WHT/BLK

Ground

Air Pump Relay


Object Number: 741234  Size: CH

Connector Part Information

    • 90980-10845
    • BLK

Pin

Wire Color

Function

1

BLK/ORN

Air Pump Relay Control

2

BLK

Air Pump Relay Supply Voltage

3

BLK/RED

Air Pump Motor Supply Voltage

4

BLK

Air Pump Relay Supply Voltage

Air Pump Pressure Sensor


Object Number: 335016  Size: CH

Connector Part Information

    • 90980-10845
    • BLK

Pin

Wire Color

Function

1

BRN

Ground

2

LT GRN

Powertrain Control Module Signal

3

YEL

5 Volt Reference

Air Pump Solenoid Valve


Object Number: 339854  Size: CH

Connector Part Information

    • 90980-10572
    • BLU

Pin

Wire Color

Function

1

BLK

Supply Voltage

2

BLK/BLU

Powertrain Control Module Signal

Ambient Air Temperature Sensor


Object Number: 334404  Size: CH

Connector Part Information

    • 90980-11030
    • BLK

Pin

Wire Color

Function

1

BLK

Ambient Air Temperature Sensor Input

2

BLK/BLU

Ground

Back Up Lamp Switch


Object Number: 334404  Size: CH

Connector Part Information

    • 90980-11250
    • GRY

Pin

Wire Color

Function

1

RED/BLK

Back Up Lamp Switch Signal Circuit

2

RED/WHT

Back Up Lamp Switch Feed Circuit

Camshaft Position (CMP) Sensor


Object Number: 339853  Size: CH

Connector Part Information

    • 90980-10947
    • BLK

Pin

Wire Color

Function

1

BLK

Camshaft Position Input

2

WHT

Sensor Ground

Camshaft Position (CMP) Actuator Solenoid Valve


Object Number: 820095  Size: CH

Connector Part Information

    • 90980-11162
    • BRN

Pin

Wire Color

Function

1

YEL

CMP Actuator High Control

2

BLK/YEL

CMP Actuator Low Control

Circuit Opening Relay


Object Number: 660786  Size: CH

Connector Part Information

--

Pin

Wire Color

Function

1

BLK

Relay Coil Feed Circuit

2

GRN/RED

Relay Coil Ground Circuit

3

BLK/RED

Relay Switch Ground Circuit

5

WHT/BLK

Relay Switch Feed Circuit

Clutch Pedal Position (CPP) Switch


Object Number: 820095  Size: CH

Connector Part Information

    • 90980-10825
    • WHT

Pin

Wire Color

Function

1

RED

CPP Feed Circuit

2

BLK

CPP Signal Circuit

Crankshaft Position (CKP) Sensor


Object Number: 339853  Size: CH

Connector Part Information

    • 90980-10947
    • GRY

Pin

Wire Color

Function

1

BLK

Crankshaft Position Input

2

WHT

Sensor Ground

Engine Coolant Temperature (ECT) Sensor


Object Number: 820010  Size: CH

Connector Part Information

    • 90980-10737
    • DK GRY

Pin

Wire Color

Function

1

BRN

Sensor Ground

2

WHT

ECT Input

EFI Relay


Object Number: 660786  Size: CH

Connector Part Information

--

Pin

Wire Color

Function

1

BLK/WHT

Relay Coil Feed Circuit

2

WHT/BLK

Relay Coil Ground Circuit

3

BLK

Relay Switch Ground Circuit

5

RED/WHT

Relay Switch Feed Circuit

EVAP Pressure Switching Solenoid


Object Number: 334995  Size: CH

Connector Part Information

    • 90980-11859
    • BLK

Pin

Wire Color

Function

1

RED

EVAP Control

2

BLK

EVAP Feed Circuit

EVAP Purge Solenoid Valve


Object Number: 339854  Size: CH

Connector Part Information

    • 90980-11156
    • BLU

Pin

Wire Color

Function

1

BLU/BLK

EVAP Control Circuit

2

BLK

EVAP Feed Circuit

EVAP Vent Solenoid Valve


Object Number: 820255  Size: CH

Connector Part Information

    • 90980-11162
    • BLK

Pin

Wire Color

Function

1

BLU

EVAP Control Circuit

2

BLK

EVAP Feed Circuit

EVAP ACIS Valve


Object Number: 820255  Size: CH

Connector Part Information

    • 90980-11149
    • BRN

Pin

Wire Color

Function

1

BLK

EVAP Feed Circuit

2

BLU/WHT

EVAP Control Circuit

Fuel Injector #1


Object Number: 334996  Size: CH

Connector Part Information

    • 90980-11875
    • GRY

Pin

Wire Color

Function

1

BLK/WHT

Fuel Injector #1 Feed Circuit

2

YEL

Fuel Injector #1 Control Circuit

Fuel Injector #2


Object Number: 334996  Size: CH

Connector Part Information

    • 90980-11875
    • GRY

Pin

Wire Color

Function

1

BLK/WHT

Fuel Injector #2 Feed Circuit

2

BLK

Fuel Injector #2 Control Circuit

Fuel Injector #3


Object Number: 334996  Size: CH

Connector Part Information

    • 90980-11875
    • GRY

Pin

Wire Color

Function

1

BLK/WHT

Fuel Injector #3 Feed Circuit

2

WHT

Fuel Injector #3 Control Circuit

Fuel Injector #4


Object Number: 334996  Size: CH

Connector Part Information

    • 90980-11875
    • GRY

Pin

Wire Color

Function

1

BLK/WHT

Fuel Injector #4 Control Circuit

2

BLU

Fuel Injector #4 Feed Circuit

Fuel Sender Assembly


Object Number: 334997  Size: CH

Connector Part Information

    • 90980-11077
    • WHT

Pin

Wire Color

Function

1

--

Not Used

2

YEL

Fuel Gage

3

BRN

Low Fuel Indicator

4

BLK/RED

Fuel Pump Feed Circuit

5

WHT/BLK

Ground

Fuel Tank Pressure Sensor


Object Number: 335005  Size: CH

Connector Part Information

    • 90980-11143
    • BLK

Pin

Wire Color

Function

1

BRN

Sensor Ground

2

BLU

Fuel Tank Pressure Input

3

YEL

Reference Voltage

Heated Oxygen Sensor (HO2S) 1


Object Number: 820019  Size: CH

Connector Part Information

    • 90980-10794
    • DK GRY

Pin

Wire Color

Function

1

BLK

HO2S1 Heater Feed Circuit

2

PNK

HO2S1 Heater Control Circuit

3

BRN

Ground

4

RED

HO2S1 Input

Heated Oxygen Sensor (HO2S) 2


Object Number: 820103  Size: CH

Connector Part Information

    • 90980-11399
    • DK GRY

Pin

Wire Color

Function

1

BLK

HO2S2 Heater Feed Circuit

2

PNK/BLK

HO2S2 Heater Control Circuit

3

BRN

Ground

4

WHT

HO2S2 Input Circuit

Idle Air Control (IAC) Motor


Object Number: 339851  Size: CH

Connector Part Information

    • 90980-11145
    • GRY

Pin

Wire Color

Function

1

BLK/BLU

IAC Valve Open Control

2

BLK

IAC Feed Circuit

3

WHT/BLK

Ground

Ignition Coil 1


Object Number: 820192  Size: CH

Connector Part Information

    • 90980-11885
    • BRN

Pin

Wire Color

Function

1

BLK/WHT

Ignition Coil Feed Circuit

2

BLU/YEL

Ignition Fail Safe Input

3

RED/BLU

Ignition Trigger Circuit

4

WHT/BLK

Ground

Ignition Coil 2


Object Number: 820192  Size: CH

Connector Part Information

    • 90980-11885
    • BRN

Pin

Wire Color

Function

1

BLK/WHT

Ignition Coil Feed Circuit

2

BLU/YEL

Ignition Fail Safe Input

3

YEL/GRN

Ignition Trigger Circuit

4

WHT/BLK

Ground

Ignition Coil 3


Object Number: 820192  Size: CH

Connector Part Information

    • 90980-11885
    • BRN

Pin

Wire Color

Function

1

BLK/WHT

Ignition Coil Feed Circuit

2

BLU/YEL

Ignition Fail Safe Input

3

GRY

Ignition Trigger Circuit

4

WHT/BLK

Ground

Ignition Coil 4


Object Number: 820192  Size: CH

Connector Part Information

    • 90980-11885
    • BRN

Pin

Wire Color

Function

1

BLK/WHT

Ignition Coil Feed Circuit

2

BLU/YEL

Ignition Fail Safe Input

3

WHT

Ignition Trigger Circuit

4

WHT/BLK

Ground

Knock Sensor (KS)


Object Number: 334996  Size: CH

Connector Part Information

    • 90980-11875
    • BLK

Pin

Wire Color

Function

1

WHT

Knock Sensor Input Circuit

2

BLK

Ground

Mass Air Flow (MAF) Sensor


Object Number: 820101  Size: CH

Connector Part Information

    • 90980-11317
    • BLK

Pin

Wire Color

Function

1

BLK

MAF Feed Circuit

2

BLU/WHT

MAF Signal Low

3

GRN

MAF Signal High

4

YEL/BLK

IAT Sensor Input

5

BRN

Sensor Ground

Noise Filter


Object Number: 820022  Size: CH

Connector Part Information

    • 90980-10843
    • GRY

Pin

Wire Color

Function

1

BLK/WHT

Noise Filter Feed Circuit

2

--

Not Used

PCM Connector C1


Object Number: 820235  Size: CH

Connector Part Information

    • 34-Pin
    • WHT

Pin

Wire Color

Function

1

YEL

Fuel Injector 1 Control

2

BLK

Fuel Injector 2 Control

3

WHT

Fuel Injector 3 Control

4

BLU

Fuel Injector 4 Control

5

BLK/BLU

Idle Air Control (IAC) Valve Control

6

WHT/BLK

Ground

7

WHT/BLK

Ground

8

RED/BLU

Ignition Trigger Signal Coil 1

9

YEL/GRN

Ignition Trigger Signal Coil 2

10

GRY

Ignition Trigger Signal Coil 3

11

WHT

Ignition Trigger Signal Coil 4

12

BLU/BLK

EVAP Canister Purge Solenoid Valve Control

13

YEL

AC Pressure Switch

14

BLK/YEL

Camshaft Position (CMP) Actuator Solenoid Valve High Control

15

YEL

Camshaft Position (CMP) Actuator Solenoid Valve Control Low

16

PNK

Line Pressure Control (PC) Solenoid Control Low*

17

RED/WHT

Line Pressure Control (PC) Solenoid Control High*

18

YEL

5-Volt Reference Circuit

19

WHT

Engine Coolant Temperature (ECT) Sensor Input

20

YEL/BLK

Intake Air Temperature (IAT) Sensor Input

21

LT GRN

Throttle Position (TP) Sensor Input

22

--

Not Used

23

BLU/YEL

Ignition Fail Safe Input

24

BLU/YEL

Rocker Arm Oil Control Solenoid Valve Control High

25

BLK

Rocker Arm Oil Control Solenoid Valve Control Low

26

BLK

Camshaft Position (CMP) Sensor Input

27

BLK

Crankshaft Position (CKP) Sensor Input

28

BRN

Sensor Ground

29

--

Not Used

30

LT GRN

Secondary AIR Injection Pressure Sensor Input

31-32

--

Not Used

33

BLK/BLU

Secondary AIR Injection Solenoid Valve Control

34

WHT

CMP Sensor and CKP Sensor Ground

PCM Connector C2


Object Number: 820243  Size: CH

Connector Part Information

    • 35-Pin
    • WHT

Pin

Wire Color

Function

1

BLK

Knock Sensor (KS) Signal High

2

WHT

Knock Sensor (KS) Signal Low

3

BLK/ORN

Secondary AIR Injection Pump Relay Control

4

PNK

Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control

5

WHT/BLK

Ground

6

--

Not Used

7

BRN

Ground

8

RED

Ignition Positive Voltage*

9

BLK

Crank Signal

10

--

Not Used

11

BLK

Torque Converter Clutch (TCC) Solenoid Control*

12-14

--

Not Used

15

BLU

Overdrive (OD) Shift Solenoid Control*

16

BLU/WHT

Shift Solenoid (SS) 2 Control Low*

17

BLU/ORN

Shift Solenoid (SS) 2 Control High*

18

BLU

Shift Solenoid (SS) 1 Control Low*

19

RED/YEL

Shift Solenoid (SS) 1 Control High*

20

--

Not Used

21

WHT

Heated Oxygen Sensor (HO2S) 2 Input

22

--

Not Used

23

RED

Heated Oxygen Sensor (HO2S) 1 Input

24

GRN

Mass Air Flow (MAF) Sensor Signal High

25

--

Not Used

26

RED

Counter Gear Speed Sensor Reference High*

27

WHT

Input Shaft Speed Sensor Reference High*

28

WHT/BLK

Ground

29

BLU/RED

Power Steering Pressure (PSP) Switch Input

30-31

--

Not Used

32

BLU/WHT

Mass Air Flow (MAF) Sensor Signal Low

33

BLK/WHT

Rocker Arm Oil Pressure Switch Input

34

GRN

Counter Gear Speed Sensor Reference Low*

35

BLK

Input Shaft Speed Sensor Reference Low*

PCM Connector C3


Object Number: 820244  Size: CH

Connector Part Information

    • 35-Pin
    • WHT

Pin

Wire Color

Function

1

BLU

EVAP Canister Vent Solenoid Valve Control

2

YEL/BLK

AC Compressor Clutch Relay Control

3

--

Not Used

4

PNK/BLK

Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control

5

BLU/WHT

Auxiliary Intake Air Control Solenoid Control

6

--

Not Used

7

LT GRN

Overdrive (OD) Indicator Control

8

LT GRN/BLK

Park Neutral Position (PNP) Switch L Position Signal

9

LT GRN

Park Neutral Position (PNP) Switch 2 Position Signal

10

BLU

Park Neutral Position (PNP) Switch D Position Signal

11

RED/BLK

Park Neutral Position (PNP) Switch R Position Signal

12-13

--

Not Used

14

YEL/RED

Engine Coolant Temperature Gage Output

15-16

--

Not Used

17

PPL/WHT

Vehicle Speed Sensor (VSS) Input

18

RED/YEL

Overdrive (OD) Cut Signal, with Cruise Control*

19

GRN/WHT

Brake Switch Signal

20-28

--

Not Used

29

GRN/BLK

Overdrive (OD) Switch Signal*

30

--

Not Used

31

YEL

AC Request Signal

32

BLK/BLU

Evaporator Temperature Sensor Input

33

GRN/WHT

AC On Signal

34-35

--

Not Used

PCM Connector C4


Object Number: 820233  Size: CH

Connector Part Information

    • 31-Pin
    • WHT

Pin

Wire Color

Function

1

BLK

Ignition Positive Voltage

2

--

Not Used

3

RED/WHT

Battery Voltage

4

RED

EVAP Pressure Switching Solenoid Control

5

BLK

Engine Speed Output for Tachometer

6

GRN

Fan 1 Relay Control

7

GRN/BLK

Fan 2 Relay Control

8

BLK/WHT

EFI Relay Control High

9

BLK/ORN

Ignition Positive Voltage

10

GRN/RED

Circuit Opening Relay Control

11

RED/YEL

MIL Control

12

GRN

Electrical Load Idle-Up Signal, Tail Lamps

13

WHT

Electrical Load Idle-Up Signal, Rear Defogger

14

YEL

Supplemental Inflatable Restraint (SIR) System Signal

15

--

Not Used

16

BLU/WHT

Cruise Control Idle

17

--

Not Used

18

BLU/RED

Serial Data

19

PNK

Data Link Connector (DLC)

20

PNK/BLK

Diagnostic Request Circuit

21

BLU

Fuel Tank Pressure (FTP) Sensor Input

22-31

--

Not Used

Rocker Arm Oil Control Valve


Object Number: 820255  Size: CH

Connector Part Information

    • 90980-11162
    • BLK

Pin

Wire Color

Function

1

BLK

Sensor Ground

2

WHT

VSS Input

Throttle Position (TP) Sensor


Object Number: 339857  Size: CH

Connector Part Information

    • 90980-11261
    • BLK

Pin

Wire Color

Function

1

BRN

Sensor Ground

2

YEL

Reference Voltage

3

LT GRN

Throttle Position Input

Vehicle Speed Sensor (Direct Clutch Speed Sensor)


Object Number: 820010  Size: CH

Connector Part Information

    • 90980-11156
    • BLK

Pin

Wire Color

Function

1

GRN

Sensor Ground

2

RED

VSS Input

Vehicle Speed Sensor (VSS)


Object Number: 820010  Size: CH

Connector Part Information

    • 90980-11156
    • BLK

Pin

Wire Color

Function

1

BLK

Sensor Ground

2

WHT

VSS Input