Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.
See also:
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, ...
Low-Beam Headlamps/Daytime Running Lamps (DRL), High-Beam Headlamps (Base)
1. For the driver side bulb, remove the windshield washer bottle filler neck by firmly pulling it straight up and out of the bottle.
2. Remove the outside cap for the low-beam headlamp/DRL bulb repla ...
Brake Pedal Travel
See your dealer if the brake pedal does not return to normal height, or if there
is a rapid increase in pedal travel. This could be a sign that brake service might
be required. ...