If you’re dealing with the frustration of a transmission that won’t shift correctly, displays a ‘Service Transmission’ warning, or leaves you stranded, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can disrupt the performance of an otherwise solid truck like your Sierra 3500. This isn’t just an inconvenience; it’s a critical failure that impacts your truck’s reliability and your peace of mind.
This listing is for a brand new, genuine GM Transmission Control Module, part number 24289415. The most significant benefit we offer is our professional programming service. Before we ship the part, we will flash it with the latest, most stable GM software updates, specifically matched to your truck using your Vehicle Identification Number (VIN). This means you receive a part that is truly ready to install, eliminating the need for expensive programming appointments at a dealership. This is the definitive solution for restoring crisp, correct shifting and clearing persistent transmission-related fault codes.
Is Your Truck Exhibiting These Telltale Signs?
- âś” Erratic or harsh shifting between gears
- âś” The transmission getting stuck in one gear (limp mode)
- âś” A ‘Service Transmission’ or Check Engine light on the dash
- âś” Diagnostic Trouble Codes (DTCs) such as P0700 (Transmission Control System Malfunction) or U0100 (Lost Communication With ECM/PCM)
- âś” A noticeable delay when shifting from Park to Drive or Reverse
- âś” Poor fuel economy directly related to inefficient shifting
A Technician’s Notebook
I recently had a 2021 Silverado 2500 in the bay with a problem that was driving the owner crazy. The truck would occasionally refuse to shift out of 1st gear after coming to a stop. No check engine light, no stored codes he could see with his basic scanner. After a few minutes, it would work fine again. In my shop, we hooked up a professional scan tool and monitored the CAN bus network data. We saw the TCM was intermittently dropping off the network entirely. This loss of communication, even for a split second, was causing the failure. Swapping in a pre-programmed TCM like this one not only fixed the communication drop but also restored the transmission’s performance. It’s often these subtle electronic faults, not mechanical ones, that plague modern trucks.
A Straightforward Guide to Installation
Installing your new 2020-2022 Sierra 3500 TCM is a manageable job for a DIYer or a quick task for any professional. The module is typically located in an accessible spot.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before starting any electrical work.
- Locate the Module: On most 2019+ Sierra and Silverado trucks, the TCM is mounted to the left-hand (driver’s side) core support, near the front of the engine bay.
- Disconnect Connectors: Carefully unclip the electrical connectors from the old TCM. There are usually locking tabs that need to be released gently.
- Remove Old Module: Unbolt the old TCM from its mounting bracket. Keep the hardware as you will reuse it.
- Install New Module: Mount your new, pre-programmed TCM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: Start the vehicle. While no further programming is needed, some vehicles may require a short drive for the system to fully recognize the new module and optimize shift points.
Verified Vehicle Compatibility
This module is a direct replacement for multiple service numbers, including 24042698, 24043411, 24043413, 24289415, and 24296206. It is guaranteed to fit the following vehicles:
SIERRA 1500 PICKUP 19 Transmission Control; new style (mirrors mount on door skin), (LH core support)
SIERRA 1500 PICKUP 20 Transmission Control; (LH core support)
SIERRA 2500 PICKUP 20-22 Transmission Control; (LH core support)
SIERRA 3500 PICKUP 20-22 Transmission Control; (LH core support)
SIERRA DENALI 1500 19-20 Transmission Control; (LH core support)
SIERRA DENALI 2500 20-22 Transmission Control; (LH core support)
SIERRA DENALI 3500 20-22 Transmission Control; (LH core support)
SILVERADO 1500 PICKUP 19 Transmission Control; new style (mirrors mount on door skin), (LH core support)
SILVERADO 1500 PICKUP 20 Transmission Control; (LH core support)
SILVERADO 2500 PICKUP 20-21 Transmission Control; (LH core support)
SILVERADO 3500 PICKUP 20-21 Transmission Control; (LH core support)
Frequently Asked Questions
Do I need to get this TCM programmed by a dealer?
Do I need to get this TCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN after you place your order, and it will arrive ready to install with the latest GM software.
How do I provide my VIN?
After your purchase is complete, you can send us a message with your 17-digit VIN, or we will contact you to request it. We cannot ship the module until we have programmed it.
My original part number is 24043411. Will this part work?
Yes. This part, 24289415, is the correct and updated service replacement for several older numbers, including 24043411. It is fully compatible.
Is this a used or rebuilt part?
This is a brand new, genuine GM component. We do not sell used or rebuilt electronic modules to ensure maximum reliability and longevity for our customers.
What is the warranty on this 2020-2022 Sierra 3500 TCM?
This module comes with a 1-year replacement warranty against any defects in the part itself. We stand behind the quality of our components and programming.