GMPartsGiant.com offers the wholesale prices for genuine 2021 Chevrolet Silverado 1500 2WD parts. Parts like Fuel Tank are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.7L, 6 Cyl 3.0L Diesel, 6 Cyl 4.3L, 8 Cyl 5.3L, 8 Cyl5.3L. Model Code: CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON.