See also:

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 vehic ...

Owner Checks and Services
At Each Fuel Stop • Check the engine oil level. See Engine Oil on page 10‑8. Once a Month • Check the tire inflation pressures. See Tire Pressure on page 10‑44. • Inspect the ti ...

Eight-Way Power Driver Seat
To adjust a power seat, if equipped: ○ Move the seat forward or rearward by sliding the control forward or rearward. ○ Raise or lower the front or rear part of the seat cushion by movi ...