OER Parts offers a wide selection of Upholstery Kits for your 1973 GMC C15/C1500 Suburban. OER Parts offers 1973 GMC C15/C1500 Suburban Bucket Seat Upholstery, 1973 GMC C15/C1500 Suburban Bench Seat Upholstery, 1973 GMC C15/C1500 Suburban Front and Rear Upholstery Kits, 1973 GMC C15/C1500 Suburban Vinyl Upholstery, 1973 GMC C15/C1500 Suburban Cloth Upholstery, 1973 GMC C15/C1500 Suburban Leather Upholstery, and 1973 GMC C15/C1500 Suburban Velour Upholstery.