GMC Sierra Owners Manuals

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Engine Power Messages
ENGINE POWER IS REDUCED This message displays and a chime sounds when the cooling system temperature gets too hot and the engine further enters the engine coolant protection mode. See Engine Overhea ...

Manual Operation
(Power): Press to turn the climate control system on or off. (Fan Control): Turn to increase or decrease the fan speed. Adjusting the fan speed while in automatic mode places the fan under ma ...

Fuel Economy Mode
Vehicles with a 2.4L engine have a Fuel Economy Mode. When engaged, fuel economy mode can improve the vehicle's fuel economy. Press the “eco” (economy) button by the shift lever to turn t ...