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:
Sensors
The solar sensor, located on top of the instrument panel near the windshield,
monitors the solar heat.
The climate control system uses the sensor information to adjust the temperature,
fan speed, ...
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
When it is safe to lift the hood:
2.4L L4 Engine
2.4L L4 Engine
A. Engine Cooling Fans (Out
of View)
B. C ...
Braking in Emergencies
ABS allows the driver to steer and brake at the same time. In many emergencies,
steering can help more than even the very best braking. ...
