GMPartsGiant.com offers the wholesale prices for genuine 2021 GMC Yukon 4WD parts. Parts like Battery Cables are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0L Diesel, 8 Cyl 5.3L. Model Code: YUKON/DENALI/ESCALADE.