To ensure reliability, purchase GM part # 20628894 Valve Assembly, Body Lock Pillar Pressure Relief *Black. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Regal, Roadmaster models. It fits Cadillac Fleetwood. It also fits Chevrolet Caprice, Impala, Lumina. This also fits Pontiac Grand Prix.
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