Restore Your Truck’s Shifting Precision and Reliability
Are you battling frustrating and unpredictable transmission behavior in your GM truck? Issues like harsh, slamming shifts, delayed gear engagement, or a persistent “Service Transmission” light on your dash are more than just an annoyance—they compromise your vehicle’s performance and your confidence on the road. The Transmission Control Module (TCM) is the electronic brain of your automatic transmission, and when it fails, these are the exact symptoms you experience. This isn’t just a component failure; it’s a direct hit to the drivability of your powerful truck.
We offer a definitive, straightforward solution: a genuine GM Transmission Control Module (Part #24289415), professionally programmed with the latest factory software specifically for your vehicle’s VIN. This isn’t a generic, one-size-fits-all part. By providing your VIN at checkout, you receive a module that is truly plug-and-play, eliminating the need for an expensive trip to the dealership for programming. This is the most efficient way to get your Sierra Denali 2500 TCM replaced and restore the smooth, responsive shifting you expect.
Real-World Repair Story
Real-World Repair Story
I recently had a 2021 Silverado 2500 in the bay with a complaint that stumped another shop. The owner described intermittent, bone-jarring shifts from 2nd to 3rd gear, but no consistent check engine light. After a test drive, I could feel it, but my scan tool showed no active DTCs. The key was digging deeper. I monitored the live data stream and saw the TCM was intermittently dropping communication for milliseconds at a time—not long enough to set a U0101 code, but just enough to disrupt the shift command. This is a classic sign of internal TCM failure. We installed a VIN-programmed module, and the truck shifted like it just rolled off the factory floor. It’s a reminder that sometimes the problem isn’t what the codes tell you, but what they don’t.
Is Your Truck Exhibiting These Transmission Problems?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention. Replacing your Sierra Denali 2500 TCM is often the correct fix for these common issues.
- âś” Harsh, abrupt, or jerky shifting between gears.
- âś” The transmission seems to get stuck in one gear (limp mode).
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
- âś” “Service Transmission” or “Shift to Park” warning messages on the instrument cluster.
- âś” Inaccurate gear indicator on the dashboard.
- âś” Communication error codes stored in the vehicle’s computer, such as P0700, U0100, or U0101.
- âś” Complete failure to shift or a no-start condition in severe cases.
Your Straightforward Installation Guide
Installing your new, pre-programmed TCM is a manageable job for a confident DIYer or a quick task for any professional technician. No special programming tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the TCM: On most late-model GM trucks like the Sierra and Silverado, the TCM is mounted to the driver’s side (LH) core support, near the radiator.
- Disconnect the Module: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them.
- Remove the Old TCM: Unbolt the module from its mounting bracket. There are typically a few small bolts holding it in place.
- Install the New TCM: Mount your new, pre-programmed module onto the bracket and secure it with the original bolts.
- Reconnect Everything: Firmly plug the electrical connectors back into the new TCM until they click into place. Reconnect your vehicle’s negative battery terminal.
- Final Steps: Start the vehicle and allow it to idle for a few minutes. Take it for a test drive to confirm that shifting is smooth and all warning lights are off.
Verified Vehicle Compatibility
This module is a direct replacement for multiple service numbers, ensuring broad compatibility. We guarantee fitment for the following vehicles provided the original module has one of the compatible service numbers. This part directly replaces: 24042698, 24043411, 24043413, 24289415, and 24296206.
- CAMARO: 2022-2023
- SIERRA 1500 PICKUP: 2019 (New Style), 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), 2020
- SILVERADO 2500 PICKUP: 2020-2021
- SILVERADO 3500 PICKUP: 2020-2021
Frequently Asked Questions
Why do you need my VIN?
Real-World Repair Story
I recently had a 2021 Silverado 2500 in the bay with a complaint that stumped another shop. The owner described intermittent, bone-jarring shifts from 2nd to 3rd gear, but no consistent check engine light. After a test drive, I could feel it, but my scan tool showed no active DTCs. The key was digging deeper. I monitored the live data stream and saw the TCM was intermittently dropping communication for milliseconds at a time—not long enough to set a U0101 code, but just enough to disrupt the shift command. This is a classic sign of internal TCM failure. We installed a VIN-programmed module, and the truck shifted like it just rolled off the factory floor. It’s a reminder that sometimes the problem isn’t what the codes tell you, but what they don’t.