To ensure reliability, purchase GM part # 12683488 Spacer, Upr Int Manif Sight Shld. 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 CT4 models. It fits Chevrolet Corvette, Silverado. It also fits GMC Sierra.
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