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:
Instrument Panel Illumination Control
This feature controls the brightness of the instrument panel controls and infotainment
display screen. The thumbwheel is located to the left of the steering column on
the instrument panel.
(In ...
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, ...
How the System Works
URPA comes on automatically when the shift lever
is moved into R (Reverse). The rear display briefly
illuminates to indicate the system is working.
URPA operates only at speeds less than 8 km/h
...