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 veh ...

OnStar Additional Information

Transferring Service Push to request account transfer eligibility information. The Advisor can assist in canceling or removing account information. If OnStar receives information that vehicle owne ...

See also:

Automatic Transmission Shift Lock Control Function Check
WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before starting this check, be sure there is enough room ar ...

Adjusting the seats
Vehicles without Memory function: the seats can be adjusted within three minutes of a front door being opened. The time period starts over again if, within these three minutes, you: • open o ...

HDC operation
With HDC engaged, the speed of descent can be altered using the cruise control steering wheel switches, as follows: • To increase speed press and hold the + switch (2) until the desired speed ...