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:
Traction Control System (TCS)/StabiliTrak® Light
The Traction Control System (TCS)/StabiliTrak light comes on briefly
when the engine is started.
If the light does not come on, have
the vehicle serviced by the dealer.
If the system is workin ...
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
• Signs that the headlamps need
attention include dimming, failure
to light, cracking, ...
Brake Fluid
The brake master cylinder and, on manual transmission vehicles, the clutch hydraulic
system use the same reservoir. See Engine Compartment Overview for the location
of the reservoir. The r ...