To ensure reliability, purchase GM part # 19131974 Core Asm,Heater. It is sometimes referred to as GM Heater Core. 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 Blazer, C10, R3500 models. It fits GMC C2500, K1500, Suburban.
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