2003 GMC Sierra 2500 HD Transmission Control ModuleReview Fitment Notes to Ensure Proper Fit
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Transmission Control Module
A1 Cardone Transmission Control Module
Part Number: 4266-05633890
Notes: Transmission Control Module -- Remanufactured; Units must be flashed ON the vehicle.Vehicle specific on-car programming must be performed AFTER install to prevent drivability issues; Relearn procedure may need to be performed upon installation of unit. Please refer to the service manual for vehicle specific instructions.
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