Restore Your Sierra’s Shifting Precision and Power
Is your 2015-2016 Sierra 3500 HD giving you transmission trouble? As a technician with over two decades of experience, I know how frustrating and concerning it is when your workhorse truck starts showing signs of a failing Transmission Control Module (TCM). Harsh shifts, getting stuck in gear, or a check engine light can sideline your truck and your work. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s reliability. You need a solution that is both dependable and straightforward, and that’s exactly what this pre-programmed TCM offers.
This is a direct-fit replacement TCM, part number 24272004 (also compatible with 24276411), that arrives at your doorstep ready for installation. The biggest hurdle with module replacement is often the expensive and time-consuming programming required at a dealership. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our experts will flash this module with the latest, most stable software from GM specifically for your truck. This ensures perfect communication between the engine and transmission, restoring the smooth, decisive shifting you expect from your Sierra.
Case Study: A Tricky Diagnosis
A few months back, a 2016 Sierra 2500 with the 6-speed Allison (MW7 option) was towed into my bay. The customer said it felt like it was “slamming into gear” and the check engine light was on. A quick scan pulled a U0100 (Lost Communication with TCM) and a P0700 (Transmission Control System Malfunction). Initially, we checked the wiring harness for damage, as these trucks can sometimes chafe wires near the fan shroud. The harness was fine. The problem was intermittent, which pointed directly to internal failure of the TCM. We installed one of our pre-programmed modules, and the truck was shifting perfectly within an hour. The customer saved hundreds compared to the dealer quote and avoided days of downtime.
Common Signs of a Failing TCM
If you’re experiencing any of the following issues, a faulty TCM is the likely culprit. Replacing your 2015-2016 Sierra 3500 TCM can resolve these problems and prevent further transmission damage.
- ✔ Abrupt or harsh shifting between gears
- ✔ The transmission getting stuck in one gear (limp mode)
- ✔ Delayed engagement when shifting from Park to Drive or Reverse
- ✔ Check Engine Light illumination with transmission-related codes
- ✔ Common Diagnostic Trouble Codes (DTCs) such as P0700, U0100, or specific solenoid circuit faults
- ✔ Inaccurate gear display on the dashboard
A Straightforward Guide to Installation
For the confident DIYer or professional mechanic, installing this module is a manageable job that requires no special programming tools. The TCM on these HD trucks is typically located in an accessible spot.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the TCM: On the 2015-2016 Sierra HD trucks, the TCM is usually mounted on the driver’s side of the fan shroud in the engine bay.
- Disconnect Connectors: Carefully unclip the electrical connectors from the old module. Inspect the connectors for any corrosion or bent pins and clean them if necessary.
- Remove the Old Module: Unbolt the old TCM from its mounting bracket. It’s typically held in place by a few small bolts.
- 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.
- Reconnect Battery: Reattach the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. A short test drive with gentle acceleration will allow the system to complete its relearn process.
Verified Vehicle Compatibility
This module is a guaranteed fit for a wide range of GM vehicles. While this listing focuses on the 2015-2016 Sierra 3500 TCM, it is also the correct part for the following models. Please verify your part number (24272004 or 24276411) and options.
- ✔ Cadillac Escalade / ESV: 2015-2017 (8-speed, M5U)
- ✔ Chevrolet Camaro: 2016
- ✔ Cadillac CTS: 2016 (ID 24276411)
- ✔ Chevrolet Silverado 1500: 2015-2016 (8-speed, M5U)
- ✔ Chevrolet Silverado 2500/3500: 2015-2016 (6-speed, MW7)
- ✔ GMC Sierra 1500 / Denali 1500: 2015-2016 (8-speed, M5U)
- ✔ GMC Sierra 2500/3500 & Denali 2500/3500: 2015-2016 (6-speed, MW7)
- ✔ GMC Yukon / Yukon XL 1500: 2015-2016 (8-speed, M5U)
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this module after I receive it?
No. This module comes fully programmed to your vehicle’s specific VIN. It is a plug-and-play solution that requires no further flashing or dealer intervention.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we have this information to complete the programming.
Where is the TCM located on my 2015 Sierra 3500?
On the 2015-2016 Sierra and Silverado HD models, the Transmission Control Module is typically mounted to the driver’s side (LH) of the fan shroud in the engine compartment for easy access.
Will this fix a U0100 communication code?
In many cases, yes. A U0100 code indicates a loss of communication with the TCM, which is a very common symptom of an internal module failure. While you should always check wiring first, a faulty TCM is the most frequent cause.
Is this a new or used part?
This is a high-quality, inspected, and tested component that is guaranteed to function correctly. It is programmed with the newest GM software to ensure optimal performance and longevity.