OER Parts offers a wide selection of Car Care Products for your 1989 GMC R2500. OER Parts offers 1989 GMC R2500 Cleaning Supplies, 1989 GMC R2500 Wheel and Tire, 1989 GMC R2500 Acid Free Wheel Cleaner, 1989 GMC R2500 Wheel Wax, 1989 GMC R2500 Tire and Trim Dressing, 1989 GMC R2500 Mag and Aluminum Polish, and 1989 GMC R2500 Regular Formula Wheel Mist.