Restore Your Truck’s Shifting Precision and Reliability
Is your Silverado or Sierra suffering from harsh, erratic shifting, getting stuck in gear, or displaying a ‘Service Transmission’ warning? These are classic signs of a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline even the toughest trucks. This isn’t just an annoyance; it’s a critical failure that compromises your vehicle’s performance and safety. You need a solution that’s both reliable and straightforward.
This is a genuine GM Transmission Control Module, part number 24289415, which serves as a direct replacement for a range of service numbers including 24042698, 24043411, and 24296206. The most significant benefit we offer is our complimentary VIN-programming service. Before we ship your part, we flash it with the latest official GM software specific to your truck. This makes the installation process seamless, eliminating the need for an expensive trip to the dealership for programming. You get a part that’s ready to install right out of the box, restoring the crisp, decisive shifting you expect from your GM vehicle.
A Technician’s Notebook
I recently had a 2020 Sierra 2500 towed into the bay. The owner was frustrated; the truck was stuck in ‘limp mode’ and wouldn’t shift past 3rd gear. The dash was lit up with warnings. A quick scan showed a U0100 code—Lost Communication with TCM. After verifying the wiring and connectors were solid, we knew the module itself was the culprit. These modern TCMs are complex, and internal circuit failures can cause them to stop communicating on the CAN bus network entirely. We installed one of our VIN-programmed modules, and after the relearn procedure, the truck was shifting perfectly. The customer was back on the road the same day, having avoided a lengthy and costly dealership appointment.
Is Your Truck Exhibiting These Telltale Signs?
A failing TCM doesn’t always cause a complete breakdown. Often, the symptoms start small and worsen over time. If you’re experiencing any of the following, your TCM is the likely cause:
- ✔ Harsh or delayed engagement into Drive or Reverse
- ✔ Abrupt, jerky, or unpredictable shifting between gears
- ✔ The vehicle enters ‘Limp Mode,’ limiting available gears
- ✔ ‘Service Transmission’ or Check Engine light is illuminated
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0606, or the dreaded U0100 (Lost Communication) are stored
A Straightforward Guide to Installation
Replacing the 2020-2021 Silverado 2500 TCM is a job a confident DIYer or any professional mechanic can handle. The module is typically located on the left-hand (driver’s side) core support in the engine bay.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical mishaps.
- Locate the TCM: Open the hood and find the TCM mounted to the driver’s side core support, near the radiator.
- Disconnect Wiring: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them.
- Unbolt the Module: Remove the mounting bolts that secure the old TCM to its bracket.
- Install the New Module: Mount your new, pre-programmed TCM in place and tighten the bolts. Reconnect the electrical connectors, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn (If Necessary): While our programming handles the critical data, some vehicles may require a transmission adaptive pressure relearn procedure with a capable scan tool for optimal performance. Often, driving the vehicle for 15-20 minutes with varied acceleration will allow it to adapt on its own.
Verified Vehicle Compatibility
This module is guaranteed to be a direct-fit replacement for the following GM vehicles. Please ensure your vehicle is on this list before ordering.
- ✔ CAMARO 2022-2023 (underhood, LH frame rail)
- ✔ SIERRA 1500 PICKUP 2019 (new style, mirrors on door skin) & 2020
- ✔ SIERRA 2500 PICKUP 2020-2022
- ✔ SIERRA 3500 PICKUP 2020-2022
- ✔ SIERRA DENALI 1500 2019-2020
- ✔ SIERRA DENALI 2500 2020-2022
- ✔ SIERRA DENALI 3500 2020-2022
- ✔ SILVERADO 1500 PICKUP 2019 (new style, mirrors on door skin) & 2020
- ✔ SILVERADO 2500 PICKUP 2020-2021
- ✔ SILVERADO 3500 PICKUP 2020-2021
Don’t let a faulty TCM dictate your truck’s performance. Order this VIN-programmed module today and restore the power and precision you depend on.
Frequently Asked Questions
Do I need to program this TCM?
No. We handle the programming for you before shipment. Simply provide your vehicle’s VIN at checkout, and the module will arrive with the latest GM software, ready for installation.
How do I provide my VIN?
You can add your 17-digit Vehicle Identification Number (VIN) in the notes section during checkout or send it to us in a message after you place your order. We cannot ship the module without it.
Where is the TCM located on my 2021 Silverado 2500?
On most of the listed trucks, including the Silverado 2500, the Transmission Control Module is mounted to the left-hand (driver’s side) core support in the engine compartment, near the front of the vehicle.
My old part has a different service number. Will this still work?
Yes. This part, 24289415, is the updated replacement for several older service numbers including 24042698, 24043411, 24043413, and 24296206. It is the correct, current part for the listed applications.
Will this fix a U0100 communication code?
In many cases, yes. A U0100 code indicates a loss of communication with the TCM. If the wiring and power/ground sources to the module are confirmed to be good, a faulty TCM is the most common cause, and replacing it with this programmed unit is the correct repair.