Locking Differential Thrust Block – GM (12471399)

Locking Differential Thrust Block is a replacement component matched to the powertrain it was built for rather than to a vehicle model in general. The number on the original part is the most reliable ordering reference.

Replace the Differential Thrust Block when the symptom traces back to this component after the surrounding circuit has been checked. Confirm the number against the original before ordering.

For this Differential Thrust Block the reference is 12471399, in our Differentials range. Compare it with the number on the part you are replacing rather than with a photograph.

This is GM dealer-sourced stock rather than an equivalent, so the number on the Differential Thrust Block traces straight back to the manufacturer.