Starting the Vehicle
1. Press and release 
on the Remote
Keyless Entry transmitter.
2. Press and hold 
for about two
seconds. The turn signal lamps will briefly flash to confirm the vehicle has been
started. The parking lamps will turn on and remain on as long as the engine is running.
The vehicle's doors will be locked.
3. The key must be inserted and turned to ON/RUN before driving.
The engine will shut off after 10 minutes unless a time extension is done or the key is inserted and turned to ON/RUN.
See also:
Power Outlets
The accessory power outlets can be used to connect electrical equipment, such
as a cell phone or MP3 player.
There are four accessory power outlets in the following locations: below the
CD slot, ...
Online Owner Center
Manage your vehicle (U.S.) at gmc.com. Click on “Owners,” then “Manage My GMC/Owners Login.”
Information and services customized for your specific vehicle — all in one convenient place.
...
Reporting Safety Defects to the United States Government
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addi ...