OnStar Services
See also:
Maintenance Schedule
Owner Checks and Services
At Each Fuel Stop
. Check the engine oil level. See Engine Oil .
Once a Month
. Check the tire inflation pressures. See Tire Pressure .
. Inspect the tires f ...
Hood
To open the hood:
1. Pull the hood release lever with
this symbol on it. It is located
inside the vehicle on the lower
side of the instrument panel.
2. Go to the front of the vehicle and
...
Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire
when tested under controlled conditions on a specified government test course. For
example, a tire graded 150 would w ...






