GM Service Manual Online
For 1990-2009 cars only
BPP Sensor Calibrate: Displays the procedure to calibrate the brake pedal position sensor, follow on screen instructions.

BPP Sensor A/D Conversi: Displays voltage. The status of the brake pedal position sensor.

BPP Sensor Displacement: Displays percent. The 0-100 percent displacement of the brake pedal position sensor.

BPPS Learned Home Posit: Displays voltage. The brake pedal position sensor learned home value of 0-5 volts.

BPP Sensor Power Supply: Displays voltage. The voltage of the brake pedal position sensor power supply 0-5 volts.

Calibrate Module: Displays the procedure to calibrate the module, follow on screen instructions.

Control Power: Displays On or Off. Indicates the commanded state of control power.

Courtesy Lamp Switch: Displays On or Off. Indicates the status of the courtesy lamp switch input.

Daytime Running Lamp: Displays On or Off. The commanded state of the DRL relay.

Dimming Potentiometer: Displays 0-5 volts. The status of the instrument panel lamp dimmer switch signal.

Dimming Enabled: Displays Yes or No. The status of the dimming enable.

Dim Level Requested: Displays percent. The status of the commanded dim level.

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

Flash to Pass Switch: Displays On or Off. Indicates the status of the flash to pass switch input.

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

Front Fog Lamp Switch: Displays On or Off. Indicates the status of the front fog lamp switch input.

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

Front Sensor: Displays 0-100%. Indicates the position of the front axle sensor in relationship to the zero point established during the calibration procedure.

Hazard Lamp Switch: Displays On or Off. Indicates the status of the hazard switch input.

Head Lamp Switch: Displays On or Off. Indicates the status of the headlamp switch input.

High Beam -- Flash to Pass: Displays On or Off. The commanded state of the high beam -- flash to pass relay.

High Beam -- Flash to Pa: Displays On or Off. Commands the high beam relay ON or OFF.

High Beam Switch/Relay: Displays On or Off. State of the high beam switch.

High/Low Beam Relay: Displays On or Off. The commanded state of the headlamp relay.

IMS: Displays PARK/REVERSE/NEUTRAL/DRIVE5/DRIVE4/DRIVE3/DRIVE2/DRIVE1. Indicates the position of the automatic transmission shift lever.

Inadvertent Power Input: Displays On or Off. Indicates the state of the inadvertent power.

Inadvertent Power Relay: Displays On or Off. Indicates the commanded state of the inadvertent power relay.

Incandescent Dimming: Displays On or Off. Indicates the state of the incandescent lamp ground circuit.

LCD Intensity: Displays the percentage of LCD intensity.

LED Intensity: Displays the percentage of LED intensity.

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

Left Turn Signal: Displays On or Off. Indicates the status of the left turn signal indicator.

Lights On With Wipers: Displays On or Off. Indicates the status of the lights on with wipers input.

Low Beam Input: Displays 0-25.5 volts. Indicates the voltage at the low beam HID bulb.

Overhead Lamps Output: Displays On or Off. Indicates the status of the overhead lamps.

Park Brake Switch: Displays On or Off. Indicates the status of the park brake switch input.

Park Lamp Switch: Displays On or Off. Indicates the status of the park lamp switch input.

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

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

Photocell: Displays 0-5 volts. The status of the ambient light sensor supply, 0.09-4.80 volts is the normal operating range.

Photocell Status: Displays Dark or Light.

Position Lamp Relay: Displays On or Off. The commanded state of the position lamp relay.

Rear Fog Lamp Relay: Displays On or Off. The commanded state of the rear fog lamp relay.

Rear Fog Lamp Switch: Displays On or Off. Indicates the status of the rear fog lamp switch input.

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

Rear Sensor: Displays 0-100%. Indicates the position of the rear axle sensor in relationship to the zero point established during the calibration procedure.

Right Turn Signal: Displays On or Off. Indicates the status of the right turn signal indicator.

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

Stepper Motor Position: Displays 0-255 Counts. Indicates the position of the headlamp leveling stepper motor.

Stop Lamp Status: Displays Valid/Not Valid. Indicates the status of the stop lamps.

Stop Lamp Switch: Displays Applied or Released. Status of the stop lamp switch input.

Switch Dimming: Displays the percentage of dimming control of the appropriate door control module output.

TCC Brake Switch : Displays Open or Closed. The state of the TCC brake switch.

Theft Lighting: Displays On or Off. Indicates the status of the theft lighting input signal.

Trunk Ajar Switch: Displays Closed/Ajar. The status of the trunk ajar switch.

Twilight Switch: Displays DAY or NIGHT. Indicates the status of the twilight photocell input.