GM 55489569 Front Engine Timing Cover Assembly

The GM 55489569 front engine cover assembly serves as the timing cover for the 2.8L LWN Duramax four-cylinder diesel engine. Constructed from cast aluminum, this component houses the timing gear train, integrates the vacuum pump mounting provision, and includes the front crankshaft seal. It is designed as a direct OEM replacement for the factory-installed cover, ensuring precise alignment of the timing components and sealing of the engine front end. The assembly is validated to General Motors engineering standards for durability and fitment across the specified vehicle platforms. This part supersedes or is associated with ACDelco part number ADO-55489569. It fits 2016 through 2022 model year Chevrolet Colorado, Express 2500, Express 3500, and GMC Canyon, Savana 2500, Savana 3500 models equipped with the 2.8L diesel engine. Installation requires standard hand tools and adherence to GM torque specifications for the cover bolts and vacuum pump fasteners.