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 ...

ACCESSORY MODE ACTIVE
If the vehicle has the keyless access system, this message displays when the accessory mode is active. See Ignition Positions (Key Access) or Ignition Positions (Keyless Access) for more inf ...

Parking Brake (Electric)
WARNING! On vehicles with a manual transmission, releasing the clutch and pressing the accelerator will release the Electric Parking Brake. If the vehicle is not in a gear, the vehicle coul ...