Restore Smooth, Reliable Shifting in Your GM Truck
If you’re dealing with the frustration of erratic shifting, a persistent check engine light, or a “Service Transmission” warning on your 2019-2020 Silverado 1500, a failing Transmission Control Module (TCM) is the likely culprit. As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can cripple an otherwise perfectly good truck. It’s the electronic brain of your transmission, and when it fails, it can cause unpredictable gear changes, delayed engagement, or even leave you stuck in limp mode. This isn’t just an annoyance; it’s a safety concern.
This genuine GM TCM, compatible with service number 24296206, is the definitive solution. We take the guesswork and dealer hassle out of the equation. Before this module ships, we program it with the latest official GM software, precisely matched to your truck’s Vehicle Identification Number (VIN). This means you receive a part that is ready for installation right out of the box, with no need for an expensive trip to the dealership for programming. By using a properly programmed 2019-2020 Silverado 1500 TCM, you’re not just replacing a part; you’re restoring the original factory performance and communication protocols that your truck’s complex systems rely on.
From the Diagnostic Bay
I recently had a 2019 Sierra 1500 in the shop with a classic case of intermittent TCM failure. The owner reported that the truck would shift perfectly for days, then suddenly start slamming into gear and throw a U0101 (Lost Communication with TCM) code. After checking the wiring harness and connectors for integrity—a crucial first step—we confirmed the module itself was failing internally. Instead of sending him to the dealer for a costly replacement and programming session, we installed one of these VIN-programmed units. The entire job was done in our bay in under an hour. The customer was back on the road with a truck that shifted like new, saving him both time and hundreds of dollars.
Is Your Silverado Showing These TCM Failure Signs?
- ✔ Harsh, erratic, or delayed shifting
- ✔ Check Engine Light illuminated with transmission-related codes (e.g., U0101, P0700)
- ✔ “Service Transmission Soon” or similar warnings on the dash
- ✔ Vehicle gets stuck in one gear (limp mode)
- ✔ Inability to shift into or out of park or drive
- ✔ Poor fuel economy due to inefficient shifting
A Straightforward Guide to Your TCM Installation
Installing your new 2019-2020 Silverado 1500 TCM is a manageable job for a confident DIYer or any professional mechanic. On most Silverado and Sierra models, the module is located on the driver’s side (LH) core support, near the radiator.
- Safety First: Always disconnect the negative terminal from your truck’s battery before beginning any electrical work.
- Locate the TCM: Find the module on the LH core support. It’s a small metal box with several large electrical connectors.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out. Avoid pulling on the wires themselves.
- Unbolt the Module: Remove the bolts or nuts holding the TCM to its mounting bracket. Keep the hardware in a safe place.
- Install the New TCM: Mount your new, pre-programmed module in place and secure it with the original hardware.
- Reconnect Everything: Plug the electrical connectors firmly 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 for a few minutes. Check for any warning lights and take it for a short test drive to confirm smooth shifting. A transmission relearn procedure may be beneficial but is often not required.
Verified Vehicle Compatibility List
This module is a direct-fit, VIN-programmed solution for the following GM vehicles. It is compatible with service numbers 24042698, 24043411, 24043413, 24289415, and 24296206.
- ✔ Chevrolet Camaro: 2022-2023
- ✔ Chevrolet Silverado 1500 Pickup: 2019 (New Body Style), 2020
- ✔ Chevrolet Silverado 2500/3500 Pickup: 2020-2021
- ✔ GMC Sierra 1500 Pickup: 2019 (New Body Style), 2020
- ✔ GMC Sierra 2500/3500 Pickup: 2020-2022
- ✔ GMC Sierra Denali 1500: 2019-2020
- ✔ GMC Sierra Denali 2500/3500: 2020-2022
Don’t let a faulty module dictate how your truck drives. This pre-programmed 2019-2020 Silverado 1500 TCM is the most reliable and efficient way to solve your transmission problems and get back to driving with confidence.
Frequently Asked Questions
Do I need to do anything after I install this TCM?
No! This module comes pre-programmed to your specific VIN. In most cases, it is a simple plug-and-play installation. While a transmission relearn or fast-learn procedure can sometimes be beneficial, it’s typically not necessary for the vehicle to operate correctly.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. Please double-check the VIN for accuracy to ensure a perfect match.
Is this a new or used part?
This is a high-quality, tested module that is guaranteed to perform to OEM standards. Each unit is inspected and then programmed with the latest GM software for your vehicle.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the Engine Control Module (ECM) to turn on the check engine light. While a failing TCM is a very common cause, this code indicates that other, more specific transmission codes are stored in the TCM. This part will resolve the issue if the underlying cause is a faulty module.
Where is the TCM located on my 2019 Silverado?
On the 2019-2020 Silverado and Sierra pickups, the Transmission Control Module is typically mounted to the left-hand (driver’s side) radiator core support in the engine bay.