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:

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. ○ The ignition should turn to LOCK/OFF only when the shift lever is in P (Park ...

Pulling a Trailer
Here are some important points: ○ There are many laws, including speed limit restrictions that apply to trailering. Check for legal requirements with state or provincial police. ○ Do n ...

Battery Replacement
Replace the battery if the REPLACE BATTERY IN REMOTE KEY message displays in the DIC. Notice: When replacing the battery, do not touch any of the circuitry on the transmitter. Static from your body ...