Get Your Heavy-Duty Truck Shifting Like New Again
If you’re dealing with the frustration of a transmission that slams into gear, hesitates, or has left you with a persistent check engine light, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Transmission Control Module (TCM) can bring a powerful truck like your 2015-2016 Silverado 2500 to a standstill. The TCM is the brain of your automatic transmission, and when it falters, it affects everything from shift quality and fuel economy to your truck’s overall reliability.
This isn’t just a replacement part; it’s a complete solution. We take a genuine OEM-spec module and flash it with the latest official GM software, programmed specifically to your truck’s Vehicle Identification Number (VIN). This critical step ensures seamless communication with your vehicle’s other systems, restoring the precise shift logic your truck had from the factory. You get a reliable, long-term fix without the high cost and scheduling headaches of a dealership visit for programming.
From the Diagnostic Bay: The Case of the Confused Transmission
A customer brought in his ’16 Sierra 2500 with the 6-speed Allison (opt MW7), complaining of intermittent, bone-jarring shifts from 2nd to 3rd gear and an occasional ‘Service Transmission’ message. No consistent codes were stored, just a history of a U0101 (Lost Communication with TCM). After verifying the wiring harness and connectors were pristine—a common first step—we suspected the TCM itself was failing internally, likely due to heat cycles. Instead of a costly diagnostic path at the dealer, we installed one of our VIN-programmed TCMs. The installation took less than an hour, and the truck’s shifting was immediately smooth and predictable. The customer saved hundreds in labor and diagnostic fees and was back on the road the same day.
Is Your Transmission Acting Up? Common TCM Failure Signs
- ✔ Harsh, erratic, or delayed shifting
- ✔ Transmission getting stuck in one gear (limp mode)
- ✔ Check Engine Light illuminated with transmission-related codes
- ✔ Common Diagnostic Trouble Codes (DTCs) like P0700, P0751, P0756, or U0101
- ✔ Unexplained loss of power or poor fuel economy
- ✔ ‘Service Transmission’ or similar warning messages on the dash
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the TCM: On the 2015-2016 Silverado/Sierra 2500/3500, the TCM is typically mounted on or near the fan shroud on the driver’s side of the engine bay.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the electrical connectors from the old TCM. Inspect them for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old TCM from its mounting bracket. It’s usually held on by a few small bolts.
- ✔ Install the New Module: Mount your new, pre-programmed TCM in place and tighten the bolts.
- ✔ Reconnect Everything: Plug the electrical connectors firmly into the new module until they click. Reconnect the negative battery terminal.
- ✔ Final Check: Start the engine and allow it to idle. The check engine light should be off. Take the truck for a test drive to confirm smooth shifting through all gears. No further programming is needed!
Verified to Fit These GM Models
This module, part number 24272004 (interchangeable with 24276411), is a direct-fit replacement for a wide range of GM vehicles. Please verify your model and options below.
- 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 / DENALI 1500 2015-2016 (LH core support, 8-speed, opt M5U)
- SIERRA 2500 / DENALI 2500 2015-2016 (LH fan shroud, 6-speed AT, opt MW7)
- SIERRA 3500 / DENALI 3500 2015-2016 (LH fan shroud, 6-speed AT, opt MW7)
- SILVERADO 1500 PICKUP 2015-2016 (LH core support, 8-speed, opt M5U)
- SILVERADO 2500 PICKUP 2015-2016 (LH fan shroud, 6-speed AT, opt MW7)
- SILVERADO 3500 PICKUP 2015-2016 (LH fan shroud, 6-speed AT, opt MW7)
- YUKON / YUKON XL 1500 2015-2016 (LH radiator, 8-speed, opt M5U)
Do I need to do any programming after I install this?
Do I need to do any programming after I install this?
No. This is the biggest benefit of our service. We program the module to your vehicle’s specific VIN before we ship it. This makes the installation a simple plug-and-play process, with no need for expensive scan tools or a trip to the dealer.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your order until we receive and validate your VIN, as it’s essential for the programming process.
Is this a genuine GM part?
This is a high-quality, OEM-spec replacement module that we program using official GM software and calibration files. It is designed to meet or exceed the original factory performance and reliability.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the Engine Control Module (ECM) to turn on the check engine light. While a faulty TCM is a very common cause, this code means there are other, more specific transmission codes stored in the TCM. This module will often resolve the root cause, but you should scan for all codes to confirm the diagnosis.
What if my part number isn’t an exact match?
This module is a direct replacement for part numbers 24272004 and 24276411. If your module has one of these numbers, this part is compatible. Our VIN programming ensures it works correctly with your specific vehicle’s configuration.