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). � ...

Cooling System
If the vehicle has the Duramax® Diesel engine, see the Duramax® Diesel Supplement for more information. The cooling system allows the engine to maintain the correct working temperature. 5.3 L En ...

Pairing a Phone
1. Press and hold for two seconds. 2. Say “Bluetooth.” This command can be skipped. 3. Say “Pair.” The system responds with instructions and a four-digit Personal Identification Number (PIN ...