Restore Flawless Shifting to Your GM Truck or Car
If you’re dealing with the frustration of harsh shifting, delayed gear engagement, or a persistent “Service Transmission” light in your GM vehicle, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can cripple an otherwise perfectly good truck or car. This isn’t just an annoyance; it’s a critical component failure that affects drivability and safety. This listing is for a genuine GM TCM, part number 24289415, which serves as the direct, updated replacement for several older service numbers.
The biggest challenge with replacing a modern TCM has always been the programming. Historically, you’d have to install the new module and then have your vehicle towed to a dealership for expensive, time-consuming software flashing. We eliminate that entire step. By providing us with your Vehicle Identification Number (VIN) at checkout, we will program this module with the very latest GM-certified software specific to your vehicle *before* it ships. This means you receive a true plug-and-play solution, a Programmed 24289415 TCM ready for immediate installation.
Case Study: A Tricky Diagnosis
I remember a 2020 Sierra 2500 that came into my shop with a complaint of intermittent, bone-jarring shifts from 2nd to 3rd gear, but only after it was fully warmed up. No check engine light was on, but a deep scan revealed a stored history code, U0101 – Lost Communication with TCM. Many shops might start by checking the wiring harness, which is a labor-intensive process. However, having seen this pattern before, I suspected the TCM itself was failing internally under heat. We installed a new, VIN-programmed module, and the problem was solved instantly. The customer saved hundreds on diagnostic labor because we recognized the specific symptom of a heat-soaked TCM failure.
Is Your Vehicle Showing 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, erratic, or delayed shifting
- ✔ Vehicle getting stuck in one gear (limp mode)
- ✔ Check Engine Light or “Service Transmission” warning on the dash
- ✔ Inaccurate gear indicator display
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, U0101, or other transmission-related faults
- ✔ Complete loss of drive or reverse engagement
A Straightforward Guide to Installation
Installing your new Programmed 24289415 TCM is a manageable job for a DIYer or any professional technician. Since the programming is already done, no special scan tools are required for the installation itself.
- 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 driver’s side (LH) core support in the engine bay. On the Camaro, it’s located on the LH frame rail, under the hood.
- Disconnect Connectors: Carefully release the locking tabs and unplug the large electrical connectors from the old module. Inspect them for any corrosion or damage.
- Remove the Old Module: Unbolt the old TCM from its mounting bracket. It’s typically held on by a few small bolts.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket and secure the bolts.
- Reconnect and Secure: Plug the electrical connectors firmly into the new module 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 test drive to confirm smooth shifting has been restored. In some cases, a transmission relearn procedure may be beneficial but is often not required.
Verified Vehicle Compatibility
This module, part number 24289415, is the correct replacement for your vehicle if it is listed below. It also supersedes previous service numbers: 24042698, 24043411, 24043413, and 24296206.
Chevrolet Silverado 1500: 2019 (New Body Style), 2020 (LH core support)
Chevrolet Silverado 2500/3500: 2020-2021 (LH core support)
GMC Sierra 1500: 2019 (New Body Style), 2020 (LH core support)
GMC Sierra 2500/3500: 2020-2022 (LH core support)
GMC Sierra Denali 1500: 2019-2020 (LH core support)
GMC Sierra Denali 2500/3500: 2020-2022 (LH core support)
Frequently Asked Questions
Frequently Asked Questions
Programmed 24289415 TCM
Do I need to do anything after installing this part?
No. Because this is a , no further programming or dealer visits are required. Simply install it, and you’re ready to go. Any existing transmission-related trouble codes should be cleared.