Programmed 2020-2022 Sierra 3500 TCM 24043413 | Direct Fit

Restore Smooth, Confident Shifting to Your GM Truck

There’s nothing more frustrating than a heavy-duty truck that can’t be trusted. When your 2020-2022 Sierra Denali 3500 starts slamming into gear, hesitating, or throwing a “Service Transmission” light on the dash, it compromises your ability to work and tow with confidence. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can cause a host of drivability nightmares. In my 20+ years as a technician, I’ve seen how a faulty TCM can sideline even the toughest trucks, often due to internal electronic failures caused by heat and vibration.

This isn’t just a replacement part; it’s a complete solution. We take the guesswork and hassle out of the repair by pre-programming this genuine GM TCM (service part number 24289415, a direct replacement for 24043413 and others) specifically to your truck’s Vehicle Identification Number (VIN). This means you get a module loaded with the latest factory software, ready for installation right out of the box. You’ll avoid a costly trip to the dealership and the need for expensive programming tools, getting your truck back to operating as it should—smoothly and reliably. This is the definitive fix for your 2020-2022 Sierra 3500 TCM problems.

Is Your Truck Showing These Transmission Symptoms?

A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs attention:

• ✔ Harsh, delayed, or erratic shifting
• ✔ Transmission stuck in one gear (limp mode)
• ✔ “Service Transmission” or “Shift to Park” message on the dash
• ✔ Check Engine Light with codes like P0700 (Transmission Control System Malfunction) or U0100 (Lost Communication With TCM)
• ✔ Inaccurate gear indicator display

A Straightforward Guide to TCM Installation

Installing your new 2020-2022 Sierra 3500 TCM is a manageable job for a DIYer with basic tools. On these trucks, the module is typically located on the left-hand (driver’s side) core support, near the radiator. Always consult a service manual for your specific vehicle configuration.

1. Safety First: Disconnect the negative terminal from your truck’s battery and wait a few minutes for the system to discharge completely.
2. Locate the TCM: Find the module on the driver’s side core support. It’s a silver or black box with large electrical connectors.
3. Disconnect Electrical Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out. Inspect the connectors for any corrosion or damage.
4. Remove Mounting Bolts: Unbolt the old TCM from its bracket. There are typically two or three bolts holding it in place.
5. Install the New Module: Mount your new, pre-programmed TCM onto the bracket and tighten the bolts securely.
6. Reconnect and Secure: Plug the electrical connectors firmly into the new module until they click, ensuring the locking tabs are engaged. Reconnect the negative battery terminal.
7. Perform Relearn (If Necessary): While this module is pre-programmed, some vehicles may require a simple clutch/shift adaptive learning procedure. This often involves driving the vehicle under various light-to-moderate throttle conditions to allow the transmission to fine-tune its shift points.

Verified Vehicle Compatibility List

This module is a direct replacement for part numbers 24042698, 24043411, 24043413, 24289415, and 24296206. It is guaranteed to fit the following vehicles:

Don’t let a faulty module keep your truck off the road. Order your pre-programmed 2020-2022 Sierra 3500 TCM today and get back to smooth, reliable performance.