CHEVROLET 1500 PICKUP 94 8-395 (6.5L, diesel), 38mm thick, R134a refrigerant. CHEVROLET 2500 PICKUP 94 8-350 (5.7L), 4.56 rear axle ratio, 38mm thick, R134a refrigerant. CHEVROLET 2500 PICKUP 94 8-350 (5.7L), 4.63 rear axle ratio, 38mm thick, R134a refrigerant.