See also:

Exterior Lighting
The exterior lamps control is located on the instrument panel to the left of the steering column. The exterior lamps control has four positions: : Briefly turn to this position to turn the ...

Bulb Replacement
For the proper type of replacement bulbs, see Replacement Bulbs. For any bulb–changing procedure not listed in this section, contact your dealer. ...

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 ...