OER Parts offers a wide selection of Transmission Components for your 1966 GMC K1000 Pickup. OER Parts offers 1966 GMC K1000 Pickup Automatic Trans, 1966 GMC K1000 Pickup Bellhousing Components, 1966 GMC K1000 Pickup Clutches & Parts, 1966 GMC K1000 Pickup Fluids & Additives, 1966 GMC K1000 Pickup Manual Trans, 1966 GMC K1000 Pickup Mounting, 1966 GMC K1000 Pickup Performance, and 1966 GMC K1000 Pickup Speedometer Parts.