To ensure reliability, purchase GM part # 12578137 Cover Assembly, Valve Rocker Arm. 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 Century, Regal, Rendezvous models. It fits Chevrolet Equinox, Impala, Malibu. It also fits Pontiac Aztek, Grand Am, Grand Prix. This also fits Saturn Relay.
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