GMPartsGiant.com offers the wholesale prices for genuine 2019 GMC Sierra 1500 New Model Denali 2WD parts. Parts like Transmission Vent Hose 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 4.3L, 8 Cyl 5.3L, 8 Cyl 6.2L, 8 Cyl5.3L. Model Code: CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON.