How do you change tire pressure on a GMC Sierra?
How do you change tire pressure on a GMC Sierra? Using a writing PEN or any device of your choice, RELEASE some air out of the DRIVER’s side tire FIRST until the horn BEEPS. Be patient as this could take up to 30 seconds for each tire. Do the exact same for ALL of the tires in this order- Driver, Front Passenger, Right Rear, then Left Rear. How can I tell if my GMC tire needs to be replaced? The easiest way to check wear on your GMC tire is with a penny. Place a penny upside down in between...