Restore Crisp, Decisive Shifting to Your GM Truck
If you’re dealing with the frustration of a transmission that can’t make up its mind—slamming into gear, hesitating, or throwing a “Service Transmission” light on your dash—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 make a powerful 2020-2022 Sierra 3500 TCM feel unreliable. This isn’t just an annoyance; it’s a critical component failure that compromises your truck’s performance and towing capability. This direct-replacement TCM, part number 24289415, is the definitive solution, arriving pre-programmed with the latest GM software matched specifically to your truck’s VIN.
Forget the dealership hassle. The typical repair involves diagnosing the issue, ordering an expensive blank module, and then paying significant labor costs for programming with specialized equipment. We eliminate those steps. By providing us with your VIN at checkout, you receive a module that is ready for installation right out of the box. It’s a true plug-and-play fix that restores the precise, factory-intended operation of your transmission.
From the Diagnostic Bay: The Intermittent Shifting Nightmare
A customer brought in his 2021 Sierra 2500 with a complaint that stumped two other shops. The truck would shift perfectly for days, then suddenly start banging into gears and throw a U0100 (Lost Communication with ECM/PCM) code, only for the problem to vanish after a key cycle. We couldn’t replicate it in the bay. From experience, these intermittent communication drops are classic signs of an internal TCM failure. The circuit board develops micro-fractures from heat cycles and vibration. We installed one of our pre-programmed TCMs, and the customer called a month later to say his truck had never shifted better. It’s a common story for these modern GM trucks.
Is Your Truck Showing These Symptoms?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Harsh or delayed shifting, especially when cold.
- ✔ The vehicle gets stuck in one gear (limp mode).
- ✔ “Service Transmission” or Check Engine Light is illuminated.
- ✔ Inaccurate gear indicator on the dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0601, or communication codes like U0100.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
A Straightforward Guide to Installation
Installing your new 2020-2022 Sierra 3500 TCM is a job most DIYers can handle with basic tools. The module is typically located on the driver’s side (LH) core support, near the radiator.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the TCM: Find the module on the left-hand (driver’s side) core support in the engine bay. It will have several large electrical connectors attached.
- Disconnect Connectors: Carefully release the locking tabs on each electrical harness and pull them straight out from the module. Do not force them.
- Unbolt the Old Module: Remove the bolts or nuts securing the old TCM to its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCM in place and tighten the fasteners.
- Reconnect and Secure: Plug the electrical connectors firmly back into the new module until they click, ensuring the locking tabs are engaged.
- Final Step: Reconnect the negative battery terminal. It’s often a good idea to let the vehicle sit for a few minutes before starting to allow all modules to initialize.
Verified Vehicle Compatibility
This module is a direct replacement for service number 24042698 and others. It is guaranteed to fit and function correctly on the following vehicles:
- ✔ 2022-2023 Chevrolet Camaro
- ✔ 2019-2020 GMC Sierra 1500 / Sierra Denali 1500
- ✔ 2020-2022 GMC Sierra 2500 & 3500 / Sierra Denali 2500 & 3500
- ✔ 2019-2020 Chevrolet Silverado 1500
- ✔ 2020-2021 Chevrolet Silverado 2500 & 3500
This is the most reliable way to fix your transmission issues and get your powerful GM truck back to performing its best. With our VIN-programming service, you’re not just buying a part; you’re buying a complete, ready-to-install solution for your 2020-2022 Sierra 3500 TCM needs.
Frequently Asked Questions
Do I need to do any programming after I receive this TCM?
No. This module arrives fully programmed to your vehicle’s VIN with the latest GM software updates. It is a plug-and-play installation, with no further programming or relearn procedures required.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the part until we have programmed it with your specific vehicle information.
Is this compatible with part number 24042698?
Yes. This part, 24289415, is the updated and correct service replacement for several older numbers, including 24042698, 24043411, 24043413, and 24296206.
What tools do I need for installation?
Installation typically only requires basic hand tools, such as a socket set to remove the old module’s mounting bolts and a wrench for the battery terminal. No specialized electronic tools are needed.
Will this fix a U0100 communication code?
In many cases, yes. A U0100 code often indicates an internal failure of the TCM, preventing it from communicating with other modules. Replacing the faulty TCM is the standard, effective repair for this issue.