On any grade of 5 percent or more, Hill Start Assist automatically engages the GMC Sierra’s brakes for 1.5 seconds or until the gas pedal is pressed. This keeps the truck from rolling rearward and ...
Image source: General Motors Co. Wouldn’t it be nice if a pickup truck stopped in the same distance even when it is towing a hefty trailer? That was the notion behind a GMC engineering plan to ...
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