Restore Flawless Shifting in Your GM Truck or Car
Is your late-model GM vehicle suffering from erratic shifting, hesitation, or a frustrating ‘Service Transmission’ warning light? You’re not alone. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can make your powerful truck or car feel unpredictable and unreliable. Driving in limp mode or dealing with harsh, clunky gear changes isn’t just annoying—it’s a safety concern. This GM Transmission Control Module, part number 24289415, is the definitive solution to get your vehicle operating as it should.
The biggest hurdle in replacing a modern TCM has always been the expensive and time-consuming programming required at a dealership. We eliminate that step entirely. Before this part ever leaves our facility, we will flash it with the latest official GM software, specifically matched to your vehicle using the VIN you provide. This means you receive a part that is truly ready for installation right out of the box, saving you hundreds of dollars in dealer fees and the hassle of a tow.
From the Diagnostic Bay: The Ghost in the Machine
I had a 2020 Silverado 2500 in the shop last month that was driving the owner crazy. The complaint was intermittent, brutally hard shifts, but only after it was fully warmed up. No check engine light, no stored codes—nothing. We checked fluid levels, scanned live data, and everything looked normal. The dealer had told him they couldn’t find a problem. On a hunch, based on seeing this pattern before, we monitored the TCM’s internal temperature data on an extended drive. Sure enough, once it hit a certain temp, the command signals to the solenoids became erratic. We swapped in one of these pre-programmed TCMs, and the problem vanished instantly. It’s a classic case of heat-induced electronic failure that a standard code scan will often miss.
Is Your Vehicle Exhibiting These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Harsh, abrupt, or clunky shifting between gears.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ The transmission seems to get stuck in one gear (limp mode).
- ✔ A ‘Service Transmission’ or Check Engine light is illuminated on your dash.
- ✔ Your scan tool shows communication-related Diagnostic Trouble Codes (DTCs) such as U0101 (Lost Communication with TCM) or a general P0700 code.
- ✔ Inconsistent or unpredictable transmission performance that worsens as the vehicle warms up.
Why Our GM Transmission Control Module is the Smart Choice
Choosing our VIN-programmed module is the most efficient path back to a reliable vehicle. We take a genuine GM-spec part and handle the complex software side for you. This ensures perfect communication between the new TCM, your engine computer (ECM), and the rest of your vehicle’s systems. You are getting a part loaded with the most current software available from the manufacturer, which often includes improvements over the original programming your vehicle came with. This service provides a permanent fix, not a temporary patch.
A Straightforward Guide to Installation
With the programming already done, the physical swap is very manageable for a DIY enthusiast or any professional technician. While specific steps may vary slightly by model, the general process is as follows:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- Locate the TCM: On most Silverado and Sierra models, you’ll find the TCM mounted to the driver’s side (LH) core support near the radiator. On the Camaro, it’s located on the driver’s side (LH) frame rail under the hood.
- Disconnect the Old Module: Carefully release the locking tabs on the electrical connectors and pull them straight out. Be gentle, as these connectors can be brittle.
- Remove the Module: Unbolt the old TCM from its mounting bracket. There are typically a few small bolts holding it in place.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket and secure it with the bolts. Reconnect the electrical connectors, ensuring they click securely into place.
- Final Step: Reconnect the negative battery terminal. It’s a good practice to clear any old codes with a scan tool after installation. Start the vehicle and enjoy smooth shifting!
Verified Vehicle Compatibility
This module is a direct replacement for part number 24289415 and is also compatible with service numbers 24042698, 24043411, 24043413, and 24296206. It is guaranteed to fit the following vehicles:
SIERRA 1500 PICKUP 2019 (New body style) & 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 body style) & 2020 (LH core support)
SILVERADO 2500 PICKUP 2020-2021 (LH core support)
SILVERADO 3500 PICKUP 2020-2021 (LH core support)
Frequently Asked Questions
Frequently Asked Questions
Do I need to take this part to the dealer for programming?
No. The main benefit of our service is that we program the module to your vehicle’s specific VIN before we ship it. It arrives ready to install, saving you time and money.
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). You can typically find this on your driver’s side dashboard (visible through the windshield), on your door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a very straightforward installation. Since the programming is done, it’s a simple process of disconnecting the old module and connecting the new one. Please see our installation guide above.
What if I have a different part number on my original module?
This module, 24289415, is a direct replacement for several earlier service numbers, including 24042698, 24043411, 24043413, and 24296206. As long as your vehicle is on our compatibility list, this part will work correctly.