GMC Sierra Owners Manuals

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If the Vehicle Is Stuck
Slowly and cautiously spin the wheels to free the vehicle when stuck in sand, mud, ice, or snow. If stuck too severely for the traction system to free the vehicle, turn the traction system off an ...

Add-On Electrical Equipment
Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle's wa ...

Rear Windows
Power Sliding Rear Window On vehicles with a power sliding rear window, the switch is located in the overhead console. The power sliding rear window works when the ignition has been turned to ACC/ ...