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ACDelco is an automobile parts brand owned by General Motors Corporation. The brand supplies factory-fitted parts and OEM-replacement parts for GM automobiles. ACDelco has its headquarters in Grand Blanc, Michigan and was established in 1916. The company was previously known by names such as United Motors Corporation, United Motors Service and United Delco.


General Motors, commonly called GM, is a leading manufacturer of automobiles that was established in 1908. GM produces various types of vehicles including mid-size, compact and full-size. General Motors markets its vehicles across 37 countries in the world under various brands including Chevrolet, Buick, Cadillac and Opel.


In addition to supplying parts for GM vehicles, ACDelco also manufactures components for non-GM vehicles, and other applications such as marine and industrial equipment. ACDelco also re-manufactures and refurbishes OEM parts. Its products are offered in over 100 countries across the world. ACDelco markets around 90,000 auto parts in about 37 product lines. It produces a wide range of components including batteries, filters, brakes, air conditioners, alternators, starters, lubricants and spark plugs, which are designed to fit various makes and models. The product line-up for air conditioners includes AC compressors, blower motors, condensers, filters and evaporators. ACDelco filters include oil, transmission and air filters. The brand also consists of a line of brake system parts that consist of brake pads, rotors, drums and calipers.


ACDelco is known for its excellent quality and performance. ACDelco's products are reliable and durable, and they go through extensive performance tests to ensure that they meet or exceed industry standards. All ACDelco parts are backed by a warranty. The brand is also widely appreciated for its distribution partner support and marketing expertise.


ACDelco Auto and Equipment Tools is a subsidiary of ACDelco, with over 30 years of experience in the production of professional tools. The company’s name is licensed to the Mobiletron Corporation, which manufactures pneumatic, cordless and digital tools. Some tools produced by the company include impact and ratchet wrenches, drills and polishers.

The history of ACDelco dates back to 1899 when Albert Champion established the Champion Ignition Company. In 1909, Champion decided to take his business to the Buick Motor Company, after which he manufactured spark plugs for the AC Spark Plug Division, the joint venture between Buick and Champion. In 1916, William C. Durant formed the United Motors Corporation, which later became a part of General Motors in 1918, along with Delco, Kiaxon and Remy Electric Company. In 1927, following Albert Champion's death, General Motors purchased his entire business. The United Motor Service was renamed the United Delco Division in 1971. Finally, in 1974, ACDelco was formed as a result of the merger of United Delco and AC Spark Plug.


In 1996, the brand passed the ultimate endurance test when an ACDelco battery from a plane that had crashed in 1944 was found under Lake Michigan. It was found to be intact and in working order despite being submerged for over 50 years! is proud to carry genuine ACDelco parts.