To ensure reliability, purchase GM part # 20510029 Retainer, Electronic Spark Control Module. 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 Cadillac CTS models. It fits Chevrolet Astro, Camaro, Cobalt. It also fits GMC Safari. This also fits Saturn Aura.
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