To ensure reliability, purchase GM part # 12651994 Engine Control Module (W/ 2Nd Mpu) E39 Service No, Start Ecm. 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 Buick Allure, Enclave, Regal models. It fits Cadillac CTS, SRX. It also fits Chevrolet Camaro, Equinox, Impala. This also fits GMC Acadia, Terrain.
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