To ensure reliability, purchase GM part # 12704475 Module Assembly, Eng Cont (W/ 2Nd Mpu). It is sometimes referred to as GM Engine 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 ATS, CTS, Escalade models. It fits Chevrolet Express, Silverado, Tahoe. It also fits GMC Savana, Sierra, Yukon.
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