To ensure reliability, purchase GM part # 7842812 Pump Assy Air Injection. It is sometimes referred to as Chevrolet Secondary Air Injection Pump. 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 Chevrolet Astro, Blazer, G20 models.
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