To ensure reliability, purchase GM part # 6580546 Pulley,A/C Compressor. It is sometimes referred to as GM A/C Clutch, GM A/C Idler Pulley. 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 Lesabre, Park Avenue, Riviera models. It fits Oldsmobile 88, 98. It also fits Pontiac Bonneville.
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