Get Your Silverado Shifting Like New Again
Is your 2015 or 2016 Silverado 2500 HD giving you transmission trouble? As a technician with over two decades of experience, I’ve seen it all: the sudden, jarring shifts, the hesitation between gears, or the dreaded check engine light that sends your truck into limp mode. These aren’t just annoyances; they’re symptoms of a failing Transmission Control Module (TCM), the electronic brain of your Allison 6-speed transmission. When it starts to fail, it can make your powerful workhorse feel unpredictable and unreliable.
This isn’t a part you can just grab off the shelf. A new TCM from the dealership requires towing your truck in and paying for expensive programming. We solve that problem. This genuine GM TCM, part number 24276411, arrives at your door pre-programmed with the latest factory software, specifically matched to your truck’s VIN. This ensures perfect communication between your engine and transmission, restoring the smooth, decisive shifting you expect from your Silverado. It’s the most direct and efficient way to solve your transmission woes and get back to work with confidence.
Case Study: A Tricky Diagnosis
A customer brought in his ’16 Silverado 2500, complaining of intermittent harsh downshifts and a U0100 ‘Lost Communication with ECM/PCM’ code that would pop up randomly. He’d already replaced a solenoid pack with no luck. On the lift, all the wiring and connectors looked pristine. The fluid was clean. My experience pointed directly to the TCM. These modules, mounted on the fan shroud, endure constant heat and vibration, which eventually causes internal circuit failures. After installing one of our VIN-programmed modules, the communication codes vanished, and the truck shifted perfectly on the test drive. It’s a classic failure I’ve diagnosed hundreds of times, and a correctly programmed module is the only reliable fix.
Is Your Truck Showing These Symptoms?
A faulty TCM can cause a variety of frustrating issues. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Harsh or erratic shifting
- ✔ Delayed engagement into Drive or Reverse
- ✔ Check Engine Light with transmission-related codes (e.g., P0700, P0751, P0756)
- ✔ Communication error codes like U0100
- ✔ Transmission stuck in one gear (limp mode)
- ✔ “Service Transmission” message on the dash
A Straightforward Guide to Installation
Installing your new 2015-2016 Silverado 2500 TCM is a job most DIYers can handle in their own driveway. The module is conveniently located, making for a quick swap.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical issues.
- Locate the TCM: Open the hood and find the TCM mounted on the driver’s side (LH) of the fan shroud.
- Disconnect Connectors: Carefully unclip the electrical connectors from the old module. There are typically release tabs you’ll need to press.
- Unbolt the Module: Remove the bolts securing the TCM to the fan shroud bracket. Keep them handy for the new part.
- Install the New TCM: Mount your new, pre-programmed TCM onto the fan shroud and secure it with the original bolts.
- Reconnect Everything: Plug the electrical connectors firmly into the new module. You should hear a click. Reconnect the negative battery terminal.
- Final Steps: Start the engine. The check engine light may still be on. It’s recommended to clear any stored diagnostic trouble codes (DTCs) with a basic OBD-II scanner. Your truck is now ready for a test drive!
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles and is guaranteed to work if your original part number is 24276411 or 24272004. While this listing is for the 2015-2016 Silverado 2500 TCM, it also fits the following models equipped with the specified options:
- Chevrolet Silverado 2500/3500 HD (2015-2016): With 6-speed AT (opt MW7)
- GMC Sierra 2500/3500 HD & Denali (2015-2016): With 6-speed AT (opt MW7)
- Chevrolet Silverado 1500 (2015-2016): With 8-speed AT (opt M5U)
- GMC Sierra 1500 & Denali 1500 (2015-2016): With 8-speed AT (opt M5U)
- Cadillac Escalade / ESV (2015-2017): With 8-speed AT (opt M5U)
- GMC Yukon / Yukon XL 1500 (2015-2016): With 8-speed AT (opt M5U)
- Chevrolet Camaro (2016)
- Cadillac CTS (2016)
Note: After purchase, you must provide your Vehicle Identification Number (VIN) so we can program the module with the latest GM software for your specific vehicle before shipment.
Frequently Asked Questions
How does the VIN programming process work?
After you place your order, simply send us your 17-digit VIN. Our technicians will use a GM-certified system to download the latest, most stable software for your specific vehicle and flash it onto the module. This ensures it’s a true plug-and-play part when it arrives.
Is this a difficult part to install myself?
Not at all. For the Silverado 2500, the TCM is located on the fan shroud, making it one of the more accessible modules to replace. With basic hand tools and our guide, most people can complete the job in under an hour, saving significantly on labor costs.
Will this fix my P0700 and U0100 codes?
While you should always perform a full diagnosis, a faulty TCM is the most common cause of codes like P0700 (Transmission Control System Malfunction) and U0100 (Lost Communication With ECM/PCM) on these trucks. If your wiring and other components are intact, this module is the definitive solution.
Do I need to perform any relearn procedure after installation?
No. Because we program the module to your VIN before shipping, no additional security or transmission relearn procedures are required. Simply install the part, clear any old codes with a scanner, and drive. The transmission will adapt as you drive.
What is the difference between this and a used module from a junkyard?
A used module will be programmed to the donor vehicle and will not work correctly in your truck. It can cause communication errors and shifting problems. Our module is not only a verified good part but is also loaded with fresh, updated software specifically for your VIN, ensuring correct operation from the start.