Restore Your Truck’s Shifting Performance and Reliability
If you’re dealing with the frustration of a transmission that’s hesitating, slamming into gear, or throwing confusing error codes, 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 bring a powerful truck like your 2020-2022 Sierra Denali 3500 to a standstill. This isn’t just an inconvenience; it’s a critical failure that compromises your truck’s performance and your confidence on the road. This replacement TCM, part number 24289415, is the definitive solution to get your transmission operating with the precision you expect from a modern GM vehicle.
The core of the problem often lies in outdated software or internal electronic component failure within the original module. Our solution eliminates the guesswork and the expensive trip to the dealership. We provide a high-quality replacement 2020-2022 Sierra 3500 TCM that is professionally programmed with the latest GM-certified software, matched specifically to your vehicle’s VIN. This means it arrives at your door ready for installation, with no additional programming or flashing required. It’s the most direct path to resolving those nagging transmission issues and restoring smooth, predictable shifting.
From the Diagnostic Bay: The Ghost in the Transmission
A customer brought in a 2021 Sierra 2500 with a complaint that stumped two other shops: intermittent, bone-jarring shifts from 2nd to 3rd gear, but only after it was fully warmed up. There were no consistent trouble codes, just a history log of a U0101 (Lost Communication with TCM). We could have chased solenoids or wiring for days. Instead, based on experience, we monitored the TCM’s live data stream during a long test drive. Right as the harsh shift occurred, we saw the module’s internal temperature reading spike erratically before it momentarily dropped all communication. The root cause wasn’t a mechanical fault; it was the TCM’s circuit board failing under heat. Replacing it with a correctly programmed module solved the problem instantly. This highlights why starting with a reliable, properly programmed TCM is often the quickest and most accurate repair.
Is Your Truck Exhibiting These Telltale Signs?
- âś” Inconsistent or harsh shifting patterns.
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
- âś” The vehicle feels stuck in one gear (often called “limp mode”).
- âś” A “Service Transmission” warning light illuminated on your dashboard.
- âś” Check Engine Light with transmission-related Diagnostic Trouble Codes (DTCs) such as P0700, P0751, or communication faults like U0101.
- âś” Complete loss of gear indicator display.
A Straightforward Guide to Installation
Installing your new 2020-2022 Sierra 3500 TCM is a manageable job for a DIY enthusiast or a quick task for any professional mechanic. The module is typically located on the driver’s side core support, near the radiator.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the TCM: Find the Transmission Control Module on the driver’s side (LH) core support. It’s a silver box with several electrical connectors.
- Disconnect Wiring: Carefully release the locking tabs and unplug all electrical harnesses connected to the old TCM. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the mounting hardware that secures the TCM to its bracket. Set the old module aside.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket and tighten the hardware.
- Reconnect and Secure: Plug the electrical harnesses firmly into the new module, ensuring all locking tabs click into place.
- Final Step: Reconnect the negative battery terminal. It’s often recommended to perform a transmission adaptive pressure reset with a capable scan tool, but many vehicles will relearn on their own over the first 50-100 miles of mixed driving.
Verified Vehicle Compatibility
This module, part number 24289415, is a direct replacement for service numbers 24042698, 24043411, 24043413, 24296206 and is guaranteed to fit the following vehicles:
- 2022-2023 Chevrolet Camaro
- 2019-2020 GMC Sierra 1500 / Denali 1500 (New Body Style)
- 2020-2022 GMC Sierra 2500 / Denali 2500
- 2020-2022 GMC Sierra 3500 / Denali 3500
- 2019-2020 Chevrolet Silverado 1500 (New Body Style)
- 2020-2021 Chevrolet Silverado 2500
- 2020-2021 Chevrolet Silverado 3500
This pre-programmed 2020-2022 Sierra 3500 TCM is the most reliable and efficient way to fix your transmission problems and get your truck performing like new again. Place your order, provide your VIN, and let us handle the rest.
Frequently Asked Questions
Do I need to do any programming after I receive this TCM?
No. We program the module to your vehicle’s specific VIN before shipping it. It arrives ready to be installed, with no need for a trip to the dealer for programming.
What is a TCM and what does it do?
The Transmission Control Module (TCM) is the electronic brain of your automatic transmission. It uses sensor data from the engine and vehicle to control shift points, line pressure, and torque converter lockup for optimal performance and fuel economy.
How do I provide my VIN number?
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 this information to complete the programming.
Is this part a direct replacement for service number 24043411?
Yes. This part, 24289415, is the updated and compatible replacement for several older service numbers, including 24043411, 24042698, 24043413, and 24296206, ensuring you get the most current hardware and software.
Will this fix my truck’s hard shifting?
In the vast majority of cases, erratic or hard shifting in these GM trucks is caused by a faulty TCM or outdated software. This pre-programmed module is designed to correct those exact issues.