The Pennzoil PZ-56 oil filter is designed for various GM vehicles, specifically fitting models from Cadillac, Chevrolet, and Saturn, particularly those with DOHC engines and specific EBay listings notes for wagons. It is equivalent to filters like the ACDelco PF46, which is commonly used in vehicles such as the Cadillac CTS, Escalade, and Chevrolet Tahoe. *** Disclaimer: Always check your owner's manual or use a parts lookup tool to ensure the filter fits your specific vehicle's engine and year.***