OER Parts offers a wide selection of Car Care Products for your 1978 GMC Truck. OER Parts offers 1978 GMC Truck Cleaning Supplies, 1978 GMC Truck Cleaners, 1978 GMC Truck 24" Large Car Duster with Plastic Detachable Handle, 1978 GMC Truck Mini Car Duster, 1978 GMC Truck 2 Lb Sta Dri Moisture Pouch (Set Of 4), 1978 GMC Truck Secret Formula Multi Purpose Fabric Cleaner, 1978 GMC Truck 1 Gallon Upholstery, Fabric Top and Carpet Cleaner, and 1978 GMC Truck Tint Safe Ammonia Free Glass Cleaner.