GMPartsGiant.com offers the wholesale prices for genuine 2018 GMC Canyon 4WD Crew Cab Denali parts. Parts like Transfer Case-Clutch Components are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.5L, 4 Cyl 2.8L Diesel, 6 Cyl 3.6L. Model Code: CREW CAB SLT - 6'2" BOX, SLT CREW CAB - 5'2" BOX.