Restore Flawless Shifting and Drivability to Your GM Truck
There’s nothing more frustrating than a modern truck that won’t shift correctly. Whether you’re dealing with harsh, clunky shifts, a transmission stuck in one gear (limp mode), or an illuminated check engine light, a faulty Transmission Control Module (TCM) is often the culprit. As the electronic brain of your transmission, the TCM is responsible for executing precise shifts, managing torque converter lockup, and ensuring overall powertrain efficiency. When it fails, your truck’s performance and reliability are severely compromised.
This is a direct-replacement Transmission Control Module, part number 24289415, for a wide range of GM vehicles, including the 2019-2020 Silverado 1500. The biggest advantage we offer is our professional, off-board programming service. Simply provide us with your vehicle’s VIN after your purchase, and our technicians will flash the module with the latest, most stable software directly from GM. This means the part arrives at your door ready for installation, saving you a costly trip to the dealership and eliminating the need for expensive scan tools or programming subscriptions. This is the most efficient way to get your truck back on the road and shifting like new.
Is Your Truck Exhibiting These TCM Failure Signs?
- ✔ Sudden, harsh, or delayed gear shifts.
- ✔ The vehicle feels stuck in one gear (often called “limp mode”).
- ✔ “Service Transmission” or “Shift to Park” message on the driver information center.
- ✔ An illuminated Check Engine Light with transmission-related Diagnostic Trouble Codes (DTCs).
- ✔ Common DTCs stored in the ECM or other modules include P0700 (Transmission Control System Malfunction) or U0101 (Lost Communication with TCM).
- ✔ Inconsistent or erratic transmission behavior that comes and goes.
Case Study: A Tricky Diagnosis
I had a 2019 Sierra 1500 in the bay last month with a complaint of intermittent, bone-jarring 2-3 shifts, but only after it was fully warmed up. No codes were present. We checked fluid levels and condition—perfect. We monitored live data, and everything looked normal until the problem occurred, at which point the line pressure command would spike erratically. After ruling out mechanical issues and wiring, we suspected a heat-soaked TCM was failing internally. We installed one of these VIN-programmed modules, and the customer reported back a week later that the truck had never shifted better. This pre-programmed 2019-2020 Silverado 1500 TCM saved hours of further diagnostic time and provided a definitive fix.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- ✔ Locate the TCM: On most of these trucks, the TCM is located on the left-hand (driver’s side) core support, near the radiator.
- ✔ Disconnect Electrical Connectors: Carefully release the locking tabs and disconnect all electrical harnesses from the old TCM. Inspect the connectors for any signs of corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old TCM from its mounting bracket. Keep the hardware as you will reuse it.
- ✔ Install the New Module: Mount your new, pre-programmed TCM onto the bracket and secure it with the original hardware.
- ✔ Reconnect and Secure: Plug the electrical connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Perform Relearn (If Necessary): While not always required, some vehicles may need a short drive cycle for the transmission to fully adapt to the new module. Drive normally, allowing the transmission to shift through all gears.
Guaranteed Fitment for Your GM Vehicle
This module, service number 24289415, is a direct replacement for parts 24042698, 24043411, 24043413, 24296206 and is verified to fit the following models. Please confirm your vehicle is on this list before ordering.
SIERRA 1500 PICKUP 19 Transmission Control; new style (mirrors mount on door skin), (LH core support)
SIERRA 1500 PICKUP 20 Transmission Control; (LH core support)
SIERRA 2500 PICKUP 20-22 Transmission Control; (LH core support)
SIERRA 3500 PICKUP 20-22 Transmission Control; (LH core support)
SIERRA DENALI 1500 19-20 Transmission Control; (LH core support)
SIERRA DENALI 2500 20-22 Transmission Control; (LH core support)
SIERRA DENALI 3500 20-22 Transmission Control; (LH core support)
SILVERADO 1500 PICKUP 19 Transmission Control; new style (mirrors mount on door skin), (LH core support)
SILVERADO 1500 PICKUP 20 Transmission Control; (LH core support)
SILVERADO 2500 PICKUP 20-21 Transmission Control; (LH core support)
SILVERADO 3500 PICKUP 20-21 Transmission Control; (LH core support)
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential for us to program the TCM with the correct GM software for your truck’s specific configuration, including engine, transmission type, and axle ratio. This ensures 100% correct operation right out of the box.
Is any additional programming needed after installation?
No. This module arrives fully programmed and ready to install. You will not need to take your vehicle to a dealer or shop for programming, saving you significant time and money.
What tools are required for installation?
Installation is straightforward for a DIYer with basic hand tools. You will typically only need a socket set to remove the mounting bolts and disconnect the battery. No special electronic tools are required.
Will this fix my P0700 trouble code?
A P0700 code simply indicates that the TCM has requested the check engine light be turned on. A faulty TCM is a very common cause. Replacing the module often resolves the P0700 and any other transmission-specific codes, but you should always ensure the wiring and transmission itself are in good health.
How do I send you my VIN?
After you complete your purchase, simply reply to your order confirmation email with your 17-digit VIN, or send it to us through our website’s contact form with your order number. We cannot ship your part until we receive the VIN.