Restore Your Truck’s Shifting Performance and Reliability
If your GMC Sierra is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, you’re not just dealing with an annoyance—you’re facing a critical failure that can leave you stranded. As a technician with over two decades of experience, I’ve seen countless GM trucks come into the bay with these exact symptoms. More often than not, the culprit is a failing Transmission Control Module (TCM). This VIN-programmed T42 TCM, part number 24235753, is the definitive solution for your 2007 Sierra 2500 Transmission Control Module issues, designed to restore the crisp, predictable shifting you depend on.
This isn’t just a replacement part; it’s a complete, ready-to-install fix. We pre-program each module to your truck’s specific Vehicle Identification Number (VIN) before it ships. This crucial step eliminates the need for expensive dealership programming, saving you time and hundreds of dollars. It arrives at your door ready to be installed, allowing you to get your workhorse back on the road quickly and confidently.
From the Diagnostic Bay: A Common Pitfall
A customer once brought in a 2008 Silverado with a classic case of what he thought was a failing transmission. It was stuck in 3rd gear (limp mode) and had a P0752 code (Shift Solenoid ‘A’ Stuck On). He had already spent a few hundred dollars replacing the solenoid himself, but the problem persisted. After a quick scan and data check, I identified the real issue: the T42 TCM was sending faulty signals. The solenoid was fine; the module was the problem. We installed a VIN-programmed TCM, and the truck was shifting perfectly in under an hour. This is a prime example of how a failing module can mimic other component failures, making a direct-fit, programmed TCM the most effective repair.
Is Your Sierra’s Transmission Showing These Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” and will not shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ The transmission seems to slip between gears or fails to downshift properly.
A Straightforward Guide to Installation
Replacing the 2007 Sierra 2500 Transmission Control Module is a job most DIYers can handle in their own driveway. It’s typically located in the engine bay for easy access.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On your Sierra, the TCM is usually found next to the battery in the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. While our programming handles the heavy lifting, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (like the 4L60E, 4L65E, and 4L80E). While this listing is for the 2007 Sierra 2500 Transmission Control Module, it is also compatible with the following models. Please verify the location noted for your specific vehicle:
- GMC Sierra / Chevrolet Silverado (2007-2013): Located next to the battery.
- GMC Savana / Chevrolet Express (2006-2014): Located in the RH engine compartment.
- Chevrolet Tahoe / GMC Yukon (2007-2009): Located next to the battery.
- Hummer H3 (2008-2010): Located in the RH rear engine compartment.
- Chevrolet Colorado / GMC Canyon (2008-2012): Located in the RH rear engine compartment.
- …and many more Buick, Cadillac, Pontiac, and Saturn models. This module interchanges with part numbers 24252114, 24234503, 24235753, 24240449, and others.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before shipping, so it’s ready for plug-and-play installation right out of the box. This saves you a trip to the dealership and their associated programming fees.
Where is the TCM located on my 2007 Sierra 2500?
On the 2007 ‘new body style’ Sierra 2500 with the 6.0L engine, the Transmission Control Module is conveniently located in the engine bay, mounted next to the battery.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While this module replacement often resolves the underlying issue causing the P0700, you should scan for other ‘P’ codes to confirm the specific transmission fault. This part is designed to correct many of those specific faults.
Is there a core charge for my old part?
No, we do not require a core charge. You can keep your old module or dispose of it without the hassle of shipping it back to us.
What kind of warranty is included?
This module comes with a one-year warranty, giving you peace of mind and confidence in your repair.