Restore Peak Performance to Your GM Truck or SUV
Is your 2015-2016 GMC Yukon XL 1500 suffering from harsh, erratic shifting, delayed gear engagement, or a persistent Check Engine Light? These are classic signs of a failing Transmission Control Module (TCM). As the ‘brain’ of your automatic transmission, a faulty TCM can make your daily drive frustrating and unpredictable. This module is the definitive solution, providing a reliable, direct-fit replacement that restores the crisp, smooth shifting you expect from your vehicle.
We take the guesswork and high cost out of the repair. Unlike a part from the dealership, this TCM arrives at your door pre-programmed with the latest official GM software, specifically matched to your vehicle using your VIN. This means no expensive trips to the dealer for programming, no special scan tools required—just a straightforward installation to get you back on the road with confidence.
Common Signs of a Failing GM Transmission Module
- ✔ Abrupt, harsh, or jerky shifting between gears.
- ✔ The transmission seems to get ‘stuck’ in one gear (limp mode).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A ‘Service Transmission’ warning message on your dashboard.
- ✔ Check Engine Light illuminated with transmission-related diagnostic trouble codes (DTCs) such as P0700, P0751, P0756, or U0101 (Lost Communication with TCM).
- ✔ Poor fuel economy due to inefficient shifting patterns.
From the Diagnostic Bay: The Misleading Shift Problem
A few months back, a 2015 Sierra 1500 with the 8-speed M5U transmission came into my shop. The owner was convinced his transmission was mechanically shot. It was banging into gear and sometimes wouldn’t shift out of 3rd. His local mechanic quoted him thousands for a transmission rebuild. But the fluid was clean, and there were no signs of internal metal shavings. I hooked up my scanner and saw a slew of solenoid performance codes and a U0101 communication code. In my 20+ years of experience, when you see communication codes paired with performance codes, the module itself is almost always the root cause. We installed a VIN-programmed 2015-2016 Yukon XL 1500 TCM (the same family of modules), and the truck shifted like it just rolled off the factory line. It saved the customer a massive, unnecessary repair bill.
A Straightforward Guide to TCM Installation
Installing your new 2015-2016 Yukon XL 1500 TCM is a manageable job for a confident DIYer. On most of these trucks and SUVs, the module is located in an accessible spot. Just follow these general steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the TCM: On the Yukon XL, Sierra, and Silverado, the TCM is typically mounted on the driver’s side of the radiator core support or fan shroud. It’s a silver box with electrical connectors.
- Disconnect Electrical Connectors: Carefully press the release tabs and pull the wiring harness connectors straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old TCM from its mounting bracket. There are usually two or three bolts holding it in place.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket and tighten the bolts securely.
- Reconnect Everything: Plug the electrical connectors firmly back into the new TCM until they click. Reconnect your negative battery terminal.
- Final Check: Start the vehicle and check for any warning lights. Take a short test drive to confirm that shifting performance has been restored.
Will This Fit My Vehicle?
This module, part number 24272004 (also interchangeable with 24276411), is a verified fit for a wide range of GM vehicles. Please confirm your model and options below. Providing your VIN at checkout is essential for us to program the correct software for your specific application.
- Cadillac Escalade / ESV (2015-2017): With 8-speed transmission (opt M5U)
- Cadillac CTS (2016): ID 24276411
- Chevrolet Camaro (2016)
- Chevrolet Silverado 1500 (2015-2016): With 8-speed transmission (opt M5U)
- Chevrolet Silverado 2500 / 3500 (2015-2016): With 6-speed AT (opt MW7)
- GMC Sierra 1500 / Denali 1500 (2015-2016): With 8-speed transmission (opt M5U)
- GMC Sierra 2500 / 3500 / Denali 2500 / 3500 (2015-2016): With 6-speed AT (opt MW7)
- GMC Yukon / Yukon XL 1500 (2015-2016): With 8-speed transmission (opt M5U)
Frequently Asked Questions
Frequently Asked Questions
Do I need to get this TCM programmed by a dealer?
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 for installation, saving you time and money.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard (visible through the windshield) and on the driver’s door jamb sticker.
Is this a difficult part to replace myself?
For someone with basic mechanical skills and tools, this is a very manageable repair. The module is typically in an easy-to-reach location, and the process involves simple unbolting and unplugging. Our installation guide provides the key steps.
What happens if I keep driving with a bad TCM?
Continuing to drive with a failing TCM can lead to progressively worse shifting, getting stuck in limp mode, and potentially causing premature wear and tear on your transmission’s mechanical components due to the constant harsh engagement.
Will this fix my transmission problems for sure?
This pre-programmed 2015-2016 Yukon XL 1500 TCM is the correct solution for a very high percentage of the symptoms listed. However, a proper diagnosis is always recommended to rule out other issues like bad wiring or internal transmission faults.