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:
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can
be obtained from your dealer.
...
Buying New Tires
GM has developed and matched specific tires for the vehicle. The original equipment tires installed were designed to meet General Motors Tire Performance Criteria Specification (TPC Spec) system ratin ...
Checking Engine Oil
It is a good idea to check the engine oil level at each fuel fill.
In order to get an accurate reading, the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop. See Engi ...