OER Parts offers a wide selection of Brake Components for your 1966 GMC 1000. OER Parts offers 1966 GMC 1000 Calipers, 1966 GMC 1000 OE Calipers, 1966 GMC 1000 Performance Calipers, 1966 GMC 1000 Front Calipers, 1966 GMC 1000 Rear Calipers, 1966 GMC 1000 Anodized Calipers, 1966 GMC 1000 Powder Coated Calipers, 1966 GMC 1000 Wilwood Calipers, 1966 GMC 1000 4-Piston Calipers, 1966 GMC 1000 Aluminum Calipers, and 1966 GMC 1000 Cast Iron Calipers.