GM Service Manual Online
For 1990-2009 cars only
Ambient Light Sensor: Displays 0-5 volts. The status of the sunload sensor assembly.

Control Power: Displays On/Off. The commanded state of the control power.

Daytime Running Lamp: Displays On/Off. The commanded state of the daytime running lamp relay.

Driver Door Jamb Sw.: Displays On/Off. The status of the driver door jamb switch.

Flash to Pass Switch: Displays On/Off. The status of the flash to pass switch.

Front Fog Lamp Relay: Displays On/Off. The commanded state of the front fog lamp relay.

Front Fog Lamp Switch: Displays On/Off. The status of the front fog lamp switch.

Hazard Lamp Switch: Displays On/Off. The status of the hazard lamp switch.

Head Lamp Switch: Displays On/Off. The status of the headlamp switch.

High Beam -- Flash to Pa: Displays On/Off. The commanded state of the flash to pass control.

High Beam Switch/Relay: Displays On/Off. The status of the headlamp high beam relay control.

Incandescent Dim 1: Displays 0-100%. The percentage of the dimming sent to the incandescent lamps.

Interior Dim Pot: Displays 0-5 volts. The status of the instrument panel lamps dimmer switch input signal.

Interior Lamp Input: Displays On/Off. The status of the inadvertent power input.

Interior Lamp Switch: Displays Auto/On. The status of the interior lamp switch.

Interior Lighting Relay: Displays On/Off. The commanded state of the interior lamp relay.

LED Dimming: Displays 0-100%. The percentage of the dimming sent to the LED lamps.

Left Rear Door Jamb Sw.: Displays On/Off. Indicates the status of the left rear door jamb switch.

Left Turn Signal: Displays On/Off. The status of the discrete left turn signal.

Lights On With Wipers: Displays On/Off. The status of the windshield wiper switch on signal.

Low/High Beam Output: Displays On/Off. The commanded state of the control power.

Overhead Lamps Output: Displays On/Off. The commanded state of the overhead lamps.

Park Lamp: Displays On/Off. The status of the park lamp switch.

Park Lamp Relay Output: Displays On/Off. The commanded state of the park lamp relay.

Pass. Door Jamb Sw.: Displays On/Off. Indicates the status of the passenger door jamb switch.

Position Lamp Relay: Displays On/Off. The commanded state of the standing lamp relay.

Reverse Lamp Relay: Displays On/Off. The commanded state of the reverse lamp relay.

Right Turn Signal: Displays On/Off. The status of the discrete right turn signal.

Rt Rear Door Jamb Sw.: Displays On/Off. Indicates the status of the right rear door jamb switch.

Switch Dimming: Displays 0-100%. The percentage of the dimming sent to the door switches.

Trailer Detection Input: Displays On/Off. The status of the trailer detect signal.

Twilight Delay Pot: Displays 0-5 volts. The status of the twilight sentinel delay switch signal.

VF Dim: Displays 0-100%. The percentage of the dimming sent to the vacuum fluorescent (VF) display of the instrument cluster.