See also:

Consistency of Readings
Always check the fluid level at least twice using the procedure described previously. Consistency (repeatable readings) is important to maintaining proper fluid level. If readings are still inconsiste ...

Knob Retainer
Floor mats with a knob retainer. Removing and Replacing the Floor Mat 1. Turn the knob until it is aligned with the slot in the floor mat grommet. 2. Pull up on the floor mat. 3. Center the slot ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...