Headlamp Wiring
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
See also:
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can
be obtained from your dealer.
If your vehicle has a diesel engine, see the Duramax diesel supplement for more
informa ...
Power Sliding Rear Window
On vehicles with a power sliding rear window, the switch is located in the overhead console. See Rear Windows on page 2‑19.
• Push the switch to open the window.
• Pull the switch to c ...
When the System Does Not Seem to Work Properly
The following messages may be displayed on the DIC:
SERVICE PARK ASSIST: If this message occurs, take the vehicle to your dealer to repair the system.
PARK ASST BLOCKED SEE OWNERS MANUAL: This messa ...





