6L80 Transmission Control Module TCM 24275873 Reman

Replacement transmission control module for the GM 6L80 and 6L90 six-speed automatic. It cross-references OE numbers 24275873 and 24275874 and covers 2010-up Cadillac, Chevrolet, GMC, Pontiac and Isuzu applications built with those units. The module is remanufactured, not new, and ships in a housing weighing about 4.6 lb.

A dead or intermittent control module is what you are left with after the hydraulics check out. Typical signs are loss of communication with the transmission controller and stored U-codes, the truck dropping into limp and holding one gear, or solenoid circuit codes setting on several circuits at the same time - a pattern that points at the module rather than at the individual solenoids. If line pressure is correct, the solenoids ohm out, and the valve body has already been gone through, the module is the part that gets replaced.

Before you order, pull the number off the old unit and confirm it matches 24275873 or 24275874. GM control modules are not plug-and-play: the replacement has to be programmed and configured to the vehicle with a scan tool that supports GM SPS programming before the transmission will shift correctly, so plan on either doing that in-house or lining up a shop that can. Skipping that step is the number one reason a good module gets returned as defective.