GMPartsGiant.com offers the wholesale prices for genuine 2021 GMC Yukon XL 4WD parts. Parts like Spare Wheel Carrier 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 XL/DENALI XL/ESCALADE ESV.