Fuel
For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax Diesel Supplement.
For Vehicles with gasoline engines, please read this.
See also:
Key and Lock Messages
REPLACE BATTERY IN REMOTE KEY
This message displays if a Remote Keyless Entry (RKE) transmitter battery is low. The battery needs to be replaced in the transmitter. See “Battery Replacement” unde ...
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 ...
Entering the Feature Settings Menu
1. Turn the ignition on and place the vehicle in P (Park).
To avoid excessive drain on the battery, it is recommended that the headlamps are turned off.
2. Press the customization button to enter th ...