GM Service Manual Online
For 1990-2009 cars only
Antenna Module: Displays the power status of the antenna module.

Antenna Signal: Displays the signal strength.

Audio Source: Displays the source of the audio input.

Balance: Displays the balance as a range from L6 to R6.

Bass: Displays the level of bass as a value from neg. 6 to 6.

CD Changer Disc Number: Displays the disc being accessed.

CD Changer Track Number: Displays the cd track being read.

CD Inserted: Displays whether a CD has been inserted or not.

Fade: Displays the level of fade as a range from R6 to F6.

Ignition Status: Displays the status of the ignition switch.

Mute Status: Displays whether the mute is active or inactive.

Park Lamp Switch: Displays the commanded status of the park lamp switch.

Radio: Displays whether the radio is On or Off.

Radio BCM Linked: Displays the linked status of the radio with the BCM.

Search Sensitivity Status: Displays the selected search sensitivity mode.

Speed Compensated Volume: Displays the level of speed sensitive volume.

Security Wait Time: Displays the active / inactive status of the security wait time.

Treble: Displays the level of treble as a value from neg. 6 to 6.

Volume Control: Displays the level of volume as a value from 0 to 63.