GMPartsGiant.com offers the wholesale prices for genuine 2017 GMC Acadia New Model AWD parts. Parts like Automatic Transmission Lower Valve Body 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, 6 Cyl 3.6L. Model Code: DENALI SUV, SLE SUV, SLE2 & ALL TERRAIN SUV, SLT & ALL TERRAIN SUV, SLT2 SUV.