Restore Your Truck’s Shifting Performance and Reliability
If you’re dealing with the frustration of a transmission that’s hunting for gears, shifting harshly, or throwing a check engine light, you know how disruptive it can be—especially in a capable truck like a Sierra 2500. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can cause a host of serious drivability issues. This isn’t just an annoyance; it’s a critical component for your vehicle’s performance and safety.
As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline a perfectly good truck. This genuine GM Transmission Control Module, part number 24289415, is the definitive solution. The biggest hurdle in this repair is typically the programming, which requires expensive, specialized tools and a trip to the dealership. We eliminate that completely. Before this part ships, we will program it with the latest GM software updates, specifically matched to your truck’s Vehicle Identification Number (VIN). This ensures it’s a true plug-and-play fix, getting you back on the road with confidence.
From the Diagnostic Bay
I remember a 2021 Silverado 2500 that came into my shop. The owner was a contractor who relied on his truck daily. It was intermittently going into ‘limp mode’ and shifting so hard between 2nd and 3rd gear that it felt like being rear-ended. He was getting a U0101 (Lost Communication with TCM) code. After verifying the wiring harness and connectors were intact, we pinpointed the internal failure of the TCM. Swapping in a pre-programmed module like this one had him back on the job site the next day, without the week-long wait and high cost the local dealer quoted him for the same repair.
Is Your Truck Exhibiting These Symptoms?
A failing TCM often gives clear warning signs. If you’re noticing any of the following, it’s a strong indicator that your module needs attention. Ignoring these can lead to more significant transmission damage down the line.
- ✔ Harsh, erratic, or delayed shifting
- ✔ Transmission stuck in one gear (limp mode)
- ✔ Check Engine Light illuminated with transmission-related codes
- ✔ Common Diagnostic Trouble Codes (DTCs) such as P0700, P0751, or U0101
- ✔ Unexplained loss of fuel economy
- ✔ Failure to shift into or out of gear
A Straightforward Guide to Installation
Replacing the 2020-2022 Sierra 2500 TCM is a manageable job for a confident DIYer. Since this module comes pre-programmed, no further electronic work is needed after installation. Always consult a service manual for your specific vehicle, but here is a general guide:
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the TCM: On most of these GM trucks, the TCM is located on the driver’s side (LH) core support, near the front of the engine bay.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out. Do not force them. Inspect the pins for any corrosion or damage.
- Remove Mounting Bolts: Unbolt the old TCM from its mounting bracket. Keep the hardware in a safe place.
- Install the New Module: Mount your new, pre-programmed TCM in place and tighten the bolts securely.
- Reconnect and Secure: Plug the electrical connectors back into the new module until they click, ensuring a solid connection.
- Final Step: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. A short drive with varied speeds will allow the system to complete its relearn process.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 24042698, 24043411, 24043413, 24289415, and 24296206. It is guaranteed to fit the following GM vehicles:
- 2022-2023 CAMARO (Underhood, LH frame rail)
- 2019 SIERRA 1500 PICKUP (New style, mirrors on door skin)
- 2020 SIERRA 1500 PICKUP
- 2020-2022 SIERRA 2500 PICKUP
- 2020-2022 SIERRA 3500 PICKUP
- 2019-2020 SIERRA DENALI 1500
- 2020-2022 SIERRA DENALI 2500
- 2020-2022 SIERRA DENALI 3500
- 2019 SILVERADO 1500 PICKUP (New style, mirrors on door skin)
- 2020 SILVERADO 1500 PICKUP
- 2020-2021 SILVERADO 2500 PICKUP
- 2020-2021 SILVERADO 3500 PICKUP
This high-quality, pre-flashed 2020-2022 Sierra 2500 TCM is your most reliable and efficient path to resolving your transmission issues and restoring the smooth, dependable operation you expect from your truck.
Frequently Asked Questions
How does the programming process work?
It’s simple. After you complete your purchase, you will provide us with your vehicle’s 17-digit VIN. Our technicians will use certified equipment to load the latest, most stable GM software specific to your truck onto the TCM before we ship it. It arrives at your door ready for installation.
Do I need to perform any additional procedures after installation?
No. Because the module is pre-programmed to your VIN, you do not need a scan tool for any setup or security relearn procedures. After installation, the vehicle may perform a brief adaptive learning cycle on its own during the first drive.
Is this a brand new part?
Yes, this is a new, genuine GM part. We ensure every module we program meets strict quality standards for performance and longevity.
Can a bad TCM cause damage to my transmission?
Absolutely. A malfunctioning TCM can cause incorrect fluid pressure and harsh shifting, which puts excessive wear and tear on internal clutches and bands. Replacing a faulty TCM promptly is a critical step in protecting the long-term health of your transmission.
What if I order the wrong part?
The VIN programming process helps prevent this. By matching the software to your VIN, we can verify compatibility before the part ever leaves our facility. Please double-check the fitment list or contact us if you are unsure.
Will this fix my specific problem?
This part corrects issues directly caused by a failed TCM. While the symptoms listed are very common for TCM failure, we always recommend a proper diagnosis by a qualified mechanic to rule out other potential issues, such as wiring problems or internal transmission faults.