Service All-Wheel Drive Light

This light should come on briefly when you turn on the ignition, as a check to show you it is working.
The service all-wheel drive light comes on to indicate that there may be a problem with the drive system and service is required. Malfunctions can be indicated by the system before any problem is apparent, which may prevent serious damage to the vehicle. This system is also designed to assist your GM dealer in correctly diagnosing a malfunction.
See also:
StabiliTrak® System
The StabiliTrak system assists with directional control of the vehicle in difficult driving conditions. The system turns on automatically every time the vehicle is started.
► To turn off both t ...
Ending a Call
Turn the Menu knob to select Hang
Up, then press SELECT. ...
Maintenance II
• Perform all services described in Maintenance I.
• Steering and suspension inspection. Visual
inspection for damaged, loose, or missing parts or
signs of wear.
• Engine cooling system in ...
