To ensure reliability, purchase GM part # 12617230 Module,Engine Control(W/O Calibration). It is sometimes referred to as Cadillac 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 CTS, STS models.
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