End Frustrating Transmission Problems in Your GM Truck or Car
As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can turn a reliable truck into a source of constant stress. If you’re dealing with erratic shifting, a check engine light that won’t go away, or your vehicle suddenly going into limp mode, the culprit is very likely a faulty TCM. This isn’t just an annoyance; it’s a critical component failure that affects your vehicle’s performance and safety. We offer a dependable and straightforward solution: a genuine GM Transmission Control Module, part number 24289415, delivered to your door fully programmed and ready for installation.
The biggest hurdle in replacing a modern TCM is the need for expensive, dealer-specific programming. We eliminate that problem entirely. Simply provide us with your vehicle’s VIN during checkout, and our experts will flash the module with the latest, most stable software directly from GM. This ensures perfect communication between the TCM, the engine, and the rest of your vehicle’s systems. You get a component that works correctly right out of the box, saving you from a costly trip to the dealership and hours of diagnostic headaches. This is the most efficient way to restore your transmission’s precise, factory-designed performance.
Case Study: The Ghost in the Transmission
A customer brought in his 2019 Sierra 1500 with a perplexing issue: intermittent, bone-jarring shifts from 2nd to 3rd gear, but only after it had been driven for 30 minutes. There were no consistent trouble codes, making diagnosis a nightmare. After checking the fluid and solenoids, we suspected the TCM was failing under heat. Instead of a costly diagnostic gamble at the dealer, he ordered one of our pre-programmed modules. The swap took less than an hour in his driveway. The result? The harsh shifting completely vanished. He saved hundreds on dealer labor and programming fees and got his truck back to shifting like new.
Is Your Truck Showing These Symptoms?
- ✔ Abrupt, harsh, or delayed gear shifts.
- ✔ The vehicle feels stuck in one gear (limp mode).
- ✔ A persistent Check Engine Light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700 (Transmission Control System Malfunction), U0101 (Lost Communication with TCM), or solenoid performance codes.
- ✔ Inaccurate gear indicator display on the dashboard.
- ✔ Reduced fuel economy due to inefficient shifting.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- ✔ Locate the TCM: On most compatible Silverado and Sierra models, the TCM is mounted on the driver’s side (LH) core support or frame rail, near the front of the engine bay. On the Camaro, it’s typically on the LH frame rail under the hood.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them.
- ✔ Remove the Old Module: Unbolt the mounting hardware holding the old TCM in place. Note the orientation before removing it.
- ✔ Install the New Module: Mount your new, pre-programmed GM Transmission Control Module in the same position and secure it with the original hardware.
- ✔ Reconnect Everything: Firmly plug the electrical connectors back into the new TCM until they click into place. Reconnect the negative battery terminal.
- ✔ Final Check: Start the vehicle and allow it to idle. Check for any warning lights and take it for a short test drive to confirm smooth shifting has been restored.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the following vehicles. It is also a compatible replacement for service numbers 24042698, 24043411, 24043413, and 24296206.
SIERRA 1500 PICKUP 2019 (New Style, mirrors on door skin; LH core support)
SIERRA 1500 PICKUP 2020 (LH core support)
SIERRA 2500 PICKUP 2020-2022 (LH core support)
SIERRA 3500 PICKUP 2020-2022 (LH core support)
SIERRA DENALI 1500 2019-2020 (LH core support)
SIERRA DENALI 2500 2020-2022 (LH core support)
SIERRA DENALI 3500 2020-2022 (LH core support)
SILVERADO 1500 PICKUP 2019 (New Style, mirrors on door skin; LH core support)
SILVERADO 1500 PICKUP 2020 (LH core support)
SILVERADO 2500 PICKUP 2020-2021 (LH core support)
SILVERADO 3500 PICKUP 2020-2021 (LH core support)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the TCM with the exact software calibration file for your truck’s specific configuration, including its engine, transmission type, and axle ratio. This ensures flawless performance and compatibility right out of the box.
Is any additional programming needed after installation?
No. Our service includes flashing the module with the latest GM updates based on your VIN. It arrives ready to install, with no need for a trip to the dealer or the use of special scan tools for programming.
What does a Transmission Control Module (TCM) do?
The TCM is the ‘brain’ of your automatic transmission. It receives data from various sensors on the engine and vehicle, and uses this information to control shift solenoids, regulate hydraulic pressure, and manage torque converter lockup for optimal performance and fuel efficiency.
Will this fix my ‘Service Transmission’ warning light?
If the warning light is caused by an internal failure of the TCM, then yes, this part is the correct fix. Common related codes include U0101 and P0700. However, you should always confirm the diagnosis, as other issues (like faulty wiring or sensors) can also trigger this warning.
Is this a genuine GM part?
Yes, this is a genuine GM component, ensuring the highest quality, reliability, and perfect fitment for your vehicle. We then provide the essential programming service to make it a complete, ready-to-install solution.