Differential Control Module – ACDelco (42745863)

Differential Control Module converts a physical condition into a signal the powertrain module acts on. The module compares that signal against an expected range at every start-up, so a failing unit is usually logged before it becomes a driveability complaint.

Replace the Differential Control Module when the fault repeats with the harness already ruled out, when resistance drifts as the part heats up, or when a connector has corroded past cleaning. Swapping a sensor to chase a wiring fault is the most common wasted repair on these circuits.

Ordering reference for the Differential Control Module is part number 42745863, categorised under Differentials. Match that number against the component you are removing before you order.

The stock here is genuine ACDELCO, and this Differential Control Module keeps the original engineering number, which matters once a number has been superseded more than once.