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).
○ The ignition key should come out only in LOCK/OFF.
Contact your dealer if service is required.
See also:
Rear Windows
Power Sliding Rear Window
On vehicles with a power sliding rear window, the switch is located in the overhead console.
The power sliding rear window works when the ignition has been turned to ACC/ ...
Leaving After Parking on a Hill
1. Apply and hold the brake pedal while you:
1.1. Start the engine.
1.2. Shift into a gear.
1.3. Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clea ...
Vehicle Overview
GMC’s full-size van sells in fewer numbers than the similar Chevrolet Express
but attracts a loyal clientele. Along with its full-size rivals from Dodge and
Ford, the rear-drive truck-based van ...





