1988-1991 Chevrolet & GMC C1500,C2500,C3500,C3500HD,K1500,K2500,K3500 with the t rims of 454 SS Standard Cab Pickup 2-Door,Base Cab & Chassis - Conventional 2-Door,Base Standard Cab Pickup 2-Door,Cheyenne Ca b & Chassis 2-Door,Cheyenne Extended Cab Pickup 2-Door,Cheyenne Standard Cab Pickup 2-Door,Scottsdale Cab & Chassis 2-Door ,Scottsdale Extended Cab Pickup 2-Door,Scottsdale Standard Cab Pickup 2-Door,Sierra Cab & Chassis 2-Door,Sierra Extended Cab P ickup 2-Door,Sierra SLE Cab & Chassis 2-Door,Sierra SLE Extended Cab Pickup 2-Door,Sierra SLE Standard Cab Pickup 2-Door,Sierr a SLX Cab & Chassis 2-Door,Sierra SLX Extended Cab Pickup 2-Door,Sierra SLX Standard Cab Pickup 2-Door,Sierra Standard Cab Pic kup 2-Door,Silverado Cab & Chassis 2-Door,Silverado Extended Cab Pickup 2-Door,Silverado Standard Cab Pickup 2-Door,Sport Stan dard Cab Pickup 2-Door,WT Standard Cab Pickup 2-Door. The engine types may include 4.1L 4098CC 250Cu. In. l6 GAS OHV Naturally Asp irated,4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated,5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated,5.7L 350Cu. In. V8 GAS OHV Na turally Aspirated,6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated,7.4L 454Cu. In. V8 GAS OHV Naturally Aspirated