OER Parts offers a wide selection of Fuel Doors & Hardware for your 2003 GMC All Models. OER Parts offers 2003 GMC All Models Fuel Filler Neck Pocket Sleeve, 2003 GMC All Models Fuel Filler Door, 2003 GMC All Models Plastic Fuel Tank Filler Door, 2003 GMC All Models Rear Fuel Door with Spring, 2003 GMC All Models Fuel Filler Door Bumper, 2003 GMC All Models Fuel Door Emblem, 2003 GMC All Models Locking Billet Fuel Door, 2003 GMC All Models Fuel Filler Door Tension Spring and 2003 GMC All Models Fuel Door Lock.