To ensure reliability, purchase GM part # 12678511 Engine Control Module Assembly (W/ 2nd Mpu). It is sometimes referred to as Chevrolet 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 Chevrolet Impala, Malibu, Trailblazer models.
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