Restore Your Truck’s Shifting Performance and Reliability
As a technician with over two decades of experience, I know the frustration of a modern truck that won’t shift correctly. That sudden, jarring clunk into gear, the hesitation when you need to accelerate, or the dreaded “limp mode” can make your powerful 2015-2016 Sierra Denali 3500 feel unreliable. The Transmission Control Module (TCM) is the electronic brain of your transmission, and when it fails, it can cause a host of serious problems. This isn’t just an annoyance; it’s a critical component for your truck’s performance and safety.
We offer a straightforward, dependable solution. This is a replacement TCM, part number 24272004 (also fits 24276411), that comes fully programmed to your truck’s specific Vehicle Identification Number (VIN). We handle the complex part—the software flashing with the latest GM updates—before it even ships. This means you can avoid a costly trip to the dealership and the hassle of scheduling a programming service. You get a part that is ready to install right out of the box, designed to restore the smooth, precise shifting you expect from your Sierra HD.
From the Diagnostic Bay
I remember a 2016 Silverado 2500 that came into my shop. The owner was a contractor who depended on his truck daily. It was throwing a U0100 (Lost Communication with ECM/PCM) and a P0700 (Transmission Control System Malfunction) code, and the transmission was stuck in 3rd gear. He was worried about a full transmission rebuild. After confirming power and ground at the TCM connector, it was clear the module itself had failed internally. We installed a VIN-programmed TCM just like this one. The entire job took less than an hour, the codes cleared, and the truck was shifting perfectly. He was back on the job site the same afternoon, saving him hundreds in diagnostic fees and potential downtime.
Common Signs of a Failing GM Transmission Control Module
If you’re experiencing any of the following, a faulty TCM could be the culprit. A new, properly programmed 2015-2016 Sierra 3500 TCM is often the correct fix.
- ✔ Harsh, delayed, or erratic shifting
- ✔ Vehicle stuck in one gear (limp mode)
- ✔ Check Engine Light illuminated with transmission-related codes (e.g., P0700, P0751, P0756)
- ✔ No communication with the TCM, often triggering a U0100 code
- ✔ Inaccurate gear display on the dashboard
- ✔ Failure to go into gear or a delay in engagement
A Straightforward Guide to Replacing Your TCM
Installing your pre-programmed module is a manageable task for a DIY enthusiast or any professional mechanic. Always consult a vehicle-specific service manual for detailed instructions and torque specs.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the TCM: On the 2015-2016 Sierra/Silverado HD trucks, the TCM is typically located on the driver’s side, attached to the fan shroud.
- Disconnect the Wiring: Carefully release the locking tabs and unplug the electrical connectors from the old module. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old TCM from its mounting bracket. Keep the hardware as you will reuse it for the new module.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Plug the electrical connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Final Check: Start the vehicle and check for any warning lights. Take it for a test drive to confirm that shifting is smooth and responsive. No further programming is required.
Guaranteed Fitment for These GM Models
This module is a direct-fit replacement for a wide range of vehicles. Please verify your part number and application from the list below. This part is programmed specifically for your VIN upon purchase.
This part will fit these makes and models with these options
CAMARO 16 Transmission Control; (underhood, LH frame rail)
CTS 16 Transmission; (LH front rail), ID 24276411
ESCALADE 15-17 Transmission; (LH radiator), (8 speed, opt M5U)
ESCALADE ESV 15-17 Transmission; (LH radiator), (8 speed, opt M5U)
SIERRA 1500 PICKUP 15 Transmission; (LH core support), (8 speed, opt M5U)
SIERRA 1500 PICKUP 16 Transmission, (LH core support), (8 speed, opt M5U)
SIERRA 2500 PICKUP 15 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7), w/model year break point (opt AVF)
SIERRA 2500 PICKUP 16 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7)
SIERRA 3500 PICKUP 15 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7), w/model year break point (opt AVF)
SIERRA 3500 PICKUP 16 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7)
SIERRA DENALI 1500 15-16 Transmission; (LH core support)
SIERRA DENALI 2500 15 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7), w/model year break point (opt AVF)
SIERRA DENALI 2500 16 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7)
SIERRA DENALI 3500 15 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7), w/model year break point (opt AVF)
SIERRA DENALI 3500 16 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7)
SILVERADO 1500 PICKUP 15-16 Transmission; (LH core support), (8 speed, opt M5U)
SILVERADO 2500 PICKUP 15 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7), w/model year break point (opt AVF)
SILVERADO 2500 PICKUP 16 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7)
SILVERADO 3500 PICKUP 15 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7), w/model year break point (opt AVF)
SILVERADO 3500 PICKUP 16 Transmission; (LH fan shroud), (AT, 6 speed, opt MW7)
YUKON 15-16 Transmission; (LH radiator), (8 speed, opt M5U)
YUKON XL 1500 15-16 Transmission; (LH radiator), (8 speed, opt M5U)
Frequently Asked Questions
Frequently Asked Questions
How does the VIN programming work?
After you complete your purchase, you will need to provide us with your 17-digit VIN. Our technicians use this number to load the exact GM-certified software for your vehicle’s configuration onto the TCM before shipping it. This ensures perfect compatibility.
Is this a simple plug-and-play installation?
Yes, because we program the module for you, it is a direct plug-and-play installation. No special tools or trips to the dealer for programming are necessary. Once installed, your vehicle will recognize the new module and operate correctly.
Will this fix my check engine light for transmission codes?
If the check engine light is on due to a faulty TCM (with codes like P0700 or U0100), this replacement module is the correct solution. After installation, the codes should clear and not return, restoring normal operation.
Where is the TCM located on my 2016 Sierra 3500?
For the 2015-2016 Sierra and Silverado 2500/3500 models, the Transmission Control Module is typically mounted on the driver’s side of the engine bay, attached directly to the fan shroud for cooling.
Do I need to return my old module?
This purchase does not require a core return. You can keep or responsibly dispose of your old module without any additional charges or hassle.