If you’re dealing with erratic shifting, a transmission stuck in gear, or a persistent check engine light in your 2015-2016 GM truck, a failing Transmission Control Module (TCM) is often the culprit. As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline an otherwise perfectly good truck. This isn’t just an inconvenience; it’s a critical component that dictates your vehicle’s performance and safety. We offer a dependable and straightforward solution: a replacement TCM, part number 24272004, delivered to your door fully programmed to your truck’s specific Vehicle Identification Number (VIN).
Forget the expensive trip to the dealership and the hassle of coordinating programming. We handle the complex part for you. Simply provide us with your VIN after purchase, and our experts will flash the module with the very latest GM-authorized software updates. This ensures that not only is the part a perfect match, but it also benefits from any drivability improvements and fixes GM has released. This is the key to restoring the crisp, predictable shifting your truck had when it was new.
From the Diagnostic Bay: The Shuddering Sierra
Just last week, a 2015 Sierra 1500 with the 8-speed M5U transmission rolled into my shop. The owner was frustrated with a harsh 1-2 shift and an intermittent shudder at highway speeds. He’d already had the fluid changed elsewhere with no improvement. After hooking up the scan tool, I saw no hard mechanical fault codes, but the data logs showed inconsistent commands from the TCM. This is a classic scenario I’ve diagnosed hundreds of times. The internal logic of the original TCM was failing. We installed one of these VIN-programmed modules, and after a quick drive cycle, the truck was shifting flawlessly. It’s a testament to how critical the correct software and a healthy module are for these modern transmissions.
Is Your GM Truck Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2015-2016 Sierra 1500 TCM issues and other compatible vehicles.
- âś” Harsh, delayed, or erratic gear shifts
- âś” Vehicle gets stuck in one gear (limp mode)
- âś” “Service Transmission” or “Shift to Park” message on the dash
- âś” Check Engine Light illuminated with transmission-related codes
- âś” Common Diagnostic Trouble Codes (DTCs) such as P0700, U0100, P0601, or solenoid performance codes
- âś” Unexplained loss of power or poor fuel economy
A Straightforward Guide to Installation
One of the biggest benefits of our pre-programmed module is the ease of installation. You don’t need specialized diagnostic tools to get your truck running right again. For a 2015-2016 Sierra 1500, the TCM is typically located on the driver’s side core support, near the radiator.
- 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 Module: Find the TCM on the driver’s side (LH) core support. It’s a small metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the electrical harnesses, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Final Steps: Start the vehicle. It may take a short drive for the transmission to complete its relearn process and for all shifting to feel perfectly smooth.
Verified Vehicle Compatibility List
This module, programmed to your VIN, is a direct replacement for part numbers 24272004 and 24276411. Please verify your vehicle is on this list and matches the specified options for guaranteed compatibility.
- CAMARO 2016 (Underhood, LH frame rail)
- CTS 2016 (LH front rail, ID 24276411)
- ESCALADE & ESCALADE ESV 2015-2017 (LH radiator, 8 speed, opt M5U)
- SIERRA 1500 PICKUP 2015-2016 (LH core support, 8 speed, opt M5U)
- SIERRA 2500/3500 PICKUP 2015-2016 (LH fan shroud, 6 speed, opt MW7)
- SIERRA DENALI 1500 2015-2016 (LH core support)
- SIERRA DENALI 2500/3500 2015-2016 (LH fan shroud, 6 speed, opt MW7)
- SILVERADO 1500 PICKUP 2015-2016 (LH core support, 8 speed, opt M5U)
- SILVERADO 2500/3500 PICKUP 2015-2016 (LH fan shroud, 6 speed, opt MW7)
- YUKON & YUKON XL 1500 2015-2016 (LH radiator, 8 speed, opt M5U)
Do I need to take this TCM to a dealership for programming?
Do I need to take this TCM to a dealership for programming?
No. The main benefit of our service is that this module arrives at your door already programmed with the latest GM software for your specific vehicle. All you need to do is provide your VIN during checkout. This saves you time and the high cost of dealership programming.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program or ship your module until we receive this information, so please provide it promptly to avoid delays.
Will this fix my transmission shudder issue?
In many cases, especially with the 8-speed (M5U) transmission, shuddering and harsh shifting are caused by software-related issues within the TCM. Installing a module with updated software is a very common and effective fix. However, severe mechanical issues or old fluid can also cause shudder, so a complete diagnosis is always recommended.
Is this part compatible with both 6-speed and 8-speed transmissions?
Yes, this hardware is used across a range of GM vehicles with different transmissions, including the 8-speed (M5U) and 6-speed (MW7). The critical factor is the VIN-specific programming we perform, which loads the correct software file for your exact powertrain configuration.
Where is the TCM located on a 2016 Sierra 1500?
On the 2015-2016 Sierra 1500 and Silverado 1500, the Transmission Control Module is mounted on the left-hand (driver’s side) radiator core support in the engine bay. It is easily accessible once the hood is open.