See also:

ELECTRONIC KEY ALREADY KNOWN
If the vehicle has the keyless access system, this message displays if you try to match a transmitter that has already been learned. See the keyless access information for Remote Keyless E ...

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 ...

Lower Anchor and Top Tether Anchor Locations
Rear Seat – Sedan or Wagon Rear Seat – Coupe (Top Tether Anchor): Seating positions with top tether anchors. (Lower Anchor): Seating positions with two lower anchors. To assist in loca ...