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:
Recommended Transfer Case Settings
You can choose among four driving settings:
Indicator lights in the dial show which setting you are in. The indicator lights will come on briefly when you turn on the ignition and one will stay on. ...
Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance.
However, if a customer wishes to write or e-mail GMC, the letter should be addressed to:
United States
GMC Customer Assistance ...
Collision Alert
When your vehicle approaches another vehicle too rapidly, the red FCA display
will flash and sound several beeps. When this occurs, the brake system prepares
for driver braking to occur more rap ...