GMPartsGiant.com offers the wholesale prices for genuine 2006 Chevrolet Avalanche 1500 4WD parts. Parts like Engine To Transmission Mounting are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.3L, 8 Cyl 5.3L Flex. Model Code: 1/2 TON.