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To reset the oil change reminder light or oil life warning in the 2011 GMC Sierra, first check the oil levels by lifting the hood and pulling out the dipstick. When inside the vehicle, close all doors and park on a level surface. Turn the key in the ignition to the "acc" or "on" position without starting the engine. Press the gas pedal down three times in a row within 5 seconds. Turn the key to the "off" position. Then start the vehicle, and the oil life reminder should no longer be flashing. Remember to keep up with regular maintenance for the Sierra, scheduling service every 7,500-10,000 miles with synthetic oil or every 5,000 miles with conventional oil.
To reset the oil service light on a 2011 GMC Sierra, follow these simple steps: Turn the ignition to the "on" position and quickly press the accelerator to the floor three times in succession. It's a fast and straightforward process.