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:
Heated and Ventilated Seats
On vehicles with heated and ventilated seats, the
ignition must be on to use the feature.
Driver’s Side Buttons shown
The buttons are located on
the front doors.
(Heated Seat Cushion and S ...
All-Wheel Drive
When to Check Lubricant
It is not necessary to regularly check fluid unless
you suspect there is a leak or you hear an
unusual noise. A fluid loss could indicate a
problem. Have it inspected and r ...
Backglass Antenna
The AM-FM antenna is integrated with the rear window defogger, located in the rear window. Make sure that the inside surface of the rear window is not scratched and that the lines on the glass are not ...
