GM Service Manual Online
For 1990-2009 cars only

Parameter

Unit

Accessory

Battery 1

Volts

Rear Defog Switch

On/Off

Rear Defog Relay Cmd.

On/Off

Rear Defog Relay Fdbk.

High/Low

Shifter Unlock Cmd.

On/Off

Shifter Unlock Fdbk.

High/Low

Afterblow Relay Cmd.

On/Off

Afterblow Relay Fdbk.

High/Low

Fuel Gauge Position

% of Full

Coolant Gauge Position

% of Gauge

A/C Sensor

Volts

Odometer

km/miles

Switch Inputs

Battery 1

Volts

Driver Door Switch

High/Low

Psgr. Door Switches

High/Low

Key In Ignition

Yes/No

Liftgate Ajar Switch

High/Low

Oil Life Reset Switch

High/Low

Park Brake Switch

High/Low

Low Coolant

Yes/No

Low Brake Fluid

Yes/No

A/C Request (Manual A/C)

Yes/No

Low Beam Input = Off

Yes/No

Low Beam Input = DRL

Yes/No

Low Beam Input = High

Yes/No

High Beam Switch

On/Off

Park Lamp Switch

On/Off

Lock Switch

On/Off

Unlock Switch

On/Off

Front Wiper Switch

On/Off

Rear Wiper Switch

On/Off

Rear Defog Switch

On/Off

Fog Lamp Switch

On/Off

Exterior Lamps

Battery 1

Volts

Low Beam Input

Volts

Low Beam Input = Off

Yes/No

Low Beam Input = DRL

Yes/No

Low Beam Input = High

Yes/No

High Beam Switch

On/Off

Park Lamp Switch

On/Off

DRL Relay Cmd.

On/Off

DRL Relay Fdbk.

High/Low

Fog Lamp Switch

On/Off

Fog Lamp Relay Cmd.

On/Off

Fog Lamp Relay Fdbk.

High/Low

Interior Lamps

Battery 1

Volts

Inadvertent Power Cmd.

On/Off

Inadvertent Power Fdbk.

High/Low

Dome Lamp Cmd.

On/Off

Dome Lamp Fdbk.

High/Low

Driver Door Switch

High/Low

Psgr. Door Switches

High/Low

Key In Ignition

Yes/No

I/P Dimmer Input

Volts

I/P Dimmer Output

% Duty Cycle

Door Locks

Battery 1

Volts

Driver Unlock Relay Cmd.

On/Off

Driver Unlock Relay Fdbk.

High/Low

Psgr. Unlock Relay Cmd.

On/Off

Psgr. Unlock Relay Fdbk.

High/Low

Lock All Relay Cmd.

On/Off

Lock All Relay Fdbk.

High/Low

Remote Lock Cmd.

Yes/No

Remote Unlock Cmd.

Yes/No

Remote Panic Cmd.

Yes/No

Remote Programmed

Yes/No

Lock Switch

On/Off

Unlock Switch

On/Off

Wiper/Washer

Battery 1

Volts

Wiper Delay Input

Volts

Wiper Delay 1

Yes/No

Wiper Delay 2

Yes/No

Wiper Delay 3

Yes/No

Front Wiper Switch

On/Off

Front Wiper Relay Cmd.

On/Off

Front Wiper Relay Fdbk.

High/Low

Rear Wiper Switch

On/Off

Rear Wiper Relay Cmd.

On/Off

Rear Wiper Relay Fdbk.

High/Low

Front Washer Motor Input

On/Off

Rear Washer Motor Input

On/Off

Security Data

Battery 1

Volts

Ignition 1 Input

High/Low

Ignition 2 Input

High/Low

Passlock Input

Volts

Passlock Power Fdbk.

High/Low

Key Learned

Yes/No

Key Learn Enabled

Yes/No

Security LED

On/Off/Flash

Horn Relay Cmd.

On/Off

Horn Relay Fdbk.

High/Low

Passlock Timer

Seconds

Auto-Learn Timer

Seconds