Restore Flawless Shifting and Get Your Truck Back to Work
Is your Silverado or Sierra suffering from harsh, erratic shifting? Are you seeing a check engine light or a ‘Service Transmission’ message? A failing Transmission Control Module (TCM) is one of the most common culprits on these modern GM trucks. As the ‘brain’ of your transmission, when it falters, it can sideline your vehicle, causing unpredictable gear changes, getting stuck in gear, or even a no-start condition. This isn’t just an annoyance; it’s a critical failure that compromises your truck’s reliability and your safety.
We offer a dependable and straightforward solution: a genuine GM Transmission Control Module, part number 24289415, that arrives at your door pre-programmed for your specific vehicle. Simply provide your Vehicle Identification Number (VIN) during checkout, and our experts will flash the module with the latest, most stable software directly from GM. This eliminates the need for an expensive trip to the dealership for programming, saving you significant time and money.
From the Diagnostic Bay: The Case of the Hesitant Sierra
Just last week, a 2019 Sierra 1500 was towed into my shop. The owner was frustrated; his truck would occasionally slam into gear from a stop and sometimes felt like it was slipping between 3rd and 4th gear. He had a persistent check engine light with a P0700 (Transmission Control System Malfunction) and a U0100 (Lost Communication With ECM/PCM) code. After verifying the wiring harness and connectors were intact—a crucial first step—all signs pointed to an internal TCM failure. These modules manage immense amounts of data and can fail electronically over time. We installed one of our pre-programmed modules, and after a quick idle relearn, the truck was shifting as smoothly as the day it left the factory. The customer was back on the road in an afternoon, avoiding a multi-day wait and a hefty bill from the dealer.
Is Your Truck Exhibiting These Symptoms?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Harsh or delayed shifting
- ✔ Getting stuck in one gear (limp mode)
- ✔ Check Engine Light with transmission-related codes (e.g., P0700, P0751)
- ✔ Communication error codes, especially U0100
- ✔ ‘Service Transmission’ warning on the dash
- ✔ Inaccurate gear indicator display
- ✔ Complete loss of drive or reverse gears
A Straightforward Guide to Installation
One of the biggest benefits of our pre-programmed GM Transmission Control Module is the ease of installation. With the programming already handled, it’s a direct-fit replacement. While professional installation is always an option, a confident DIYer can complete this job with basic hand tools.
- 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 Silverado and Sierra models, the TCM is mounted on the left-hand (driver’s side) core support or frame rail in the engine bay. On the Camaro, it’s typically on the LH frame rail under the hood. It’s a silver box with large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly to avoid damaging them. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the electrical connectors until they click, ensuring a solid connection.
- Reconnect and Start: Reconnect the negative battery terminal. Start the vehicle and let it idle for 3-5 minutes. This allows the vehicle’s computer systems to recognize the new module. A short test drive with gentle acceleration will complete the process.
Will This Module Fit My Vehicle?
This module is a guaranteed fit for the following GM vehicles. It directly replaces service numbers 24042698, 24043411, 24043413, 24289415, and 24296206.
SIERRA 1500 PICKUP: 2019 (New Body Style), 2020 (Transmission Control; LH core support)
SIERRA 2500/3500 PICKUP: 2020–2022 (Transmission Control; LH core support)
SIERRA DENALI 1500: 2019–2020 (Transmission Control; LH core support)
SIERRA DENALI 2500/3500: 2020–2022 (Transmission Control; LH core support)
SILVERADO 1500 PICKUP: 2019 (New Body Style), 2020 (Transmission Control; LH core support)
SILVERADO 2500/3500 PICKUP: 2020–2021 (Transmission Control; LH core support)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any additional programming after installation?
No. This is the primary benefit of our service. We program the GM Transmission Control Module to your vehicle’s VIN before shipping. It arrives ready for installation with no dealer tools required.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a follow-up message. We cannot ship the part until we receive your VIN.
What if my old part number is slightly different?
This module, part number 24289415, is the correct and updated replacement for several older service numbers, including 24042698, 24043411, 24043413, and 24296206. As long as your vehicle is on the compatibility list, this is the correct part.
Is this a new or used part?
This is a high-quality, inspected part that has been programmed with new, genuine GM software. It is tested to ensure full functionality and reliability, providing a cost-effective and dependable repair.
Will this fix my ‘limp mode’ issue?
In the vast majority of cases where limp mode is caused by a failed TCM or communication errors like U0100, this module will resolve the issue. It restores proper communication between the engine and transmission, allowing the vehicle to operate normally.