Introduction
The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, GMC, the GMC Truck Emblem, and SIERRA are trademarks and/or service marks of General Motors LLC, its subsidiaries, affiliates, or licensors.
This manual describes features that may or may not be on your specific vehicle either because they are options that you did not purchase or due to changes subsequent to the printing of this owner manual.
Please refer to the purchase documentation relating to your specific vehicle to confirm each of the features found on your vehicle.
For vehicles first sold in Canada, substitute the name “General Motors of Canada Limited” for GMC Division wherever it appears in this manual.
If the vehicle has the Duramax® diesel engine, see the Duramax diesel supplement for additional and specific information on this engine.
If the vehicle is a hybrid, see the hybrid supplement for more information.
Keep this manual in the vehicle for quick reference.
See also:
Overheated Engine Protection Operating Mode
If an overheated engine condition exists and the ENGINE POWER IS REDUCED message displays, an overheat protection mode which alternates firing groups of cylinders helps to prevent engine damage. In th ...
After Off-Road Driving
Remove any brush or debris that has collected on the underbody or chassis, or
under the hood. These accumulations can be a fire hazard. After operation in mud
or sand, have the brake linings clean ...
Tire Inspection
We recommend that the tires, including the spare tire, if the vehicle has one, be inspected for signs of wear or damage at least once a month.
Replace the tire if:
• The indicators at three or mor ...