Restore Peak Performance to Your 2007 Silverado 2500 Transmission Control Module
If your hard-working 2007 Chevrolet Silverado 2500 is plagued by erratic shifting, getting stuck in gear, or has a check engine light glaring from the dash, a failing Transmission Control Module (TCM) is the likely culprit. Over my two decades of diagnosing these trucks, I’ve seen countless T42 TCMs fail due to heat cycles and vibration, leading to frustrating and unpredictable driving behavior. This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded. This replacement T42 TCM, part number 24238856, is the definitive solution, engineered to OEM specifications and delivered to your door pre-programmed for your truck’s specific VIN.
Forget about expensive dealership visits and the hassle of programming tools. We handle the critical software calibration for you. By providing your VIN at checkout, we flash the module with the latest GM software updates. This ensures it communicates perfectly with your truck’s Engine Control Module (ECM) and other systems right out of the box, restoring the crisp, decisive shifts you expect from your 4L80E transmission.
Case Study: A Tricky Diagnosis
A customer brought in his ’07 Silverado 2500 work truck, complaining it was stuck in ‘limp mode’ (3rd gear only) and throwing a P0700 code. He’d already replaced two shift solenoids based on a generic code reading, but the problem persisted. After a quick scan, I confirmed the TCM wasn’t communicating properly. The internal circuits had failed. We installed one of our VIN-programmed T42 modules. In under 30 minutes, the truck was shifting perfectly, all codes were cleared, and the customer was back on the road to his next job. This is the power of a part that’s programmed correctly from the start—it eliminates guesswork and prevents unnecessary repairs.
Is Your Silverado Showing These Symptoms?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ A noticeable drop in fuel economy or a feeling of sluggish performance.
- ✔ Complete loss of communication with the TCM, preventing diagnostics.
A Straightforward Guide to Installation
This is a repair you can confidently tackle in your own garage. For the 2007 Silverado 2500, the TCM is conveniently located in the engine bay, right next to the battery. The entire process takes less than half an hour.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: Open the hood and find the TCM mounted on a bracket next to the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, VIN-programmed module onto the bracket and securely plug in the electrical connectors until they click into place.
- Final Steps: Reconnect the battery terminal. Start the truck and allow it to idle for a few minutes. If you have a scan tool, it’s good practice to clear any stored fault codes.
Verified Vehicle Compatibility
While this part is a direct fit for the 2007 Silverado 2500 with the 6.0L engine, it is also compatible with a wide range of other GM vehicles. This module is interchangeable with part numbers 24252114, 24234503, 24238856, and others. Please verify the fitment list below or contact us with your VIN to ensure perfect compatibility.
Fits Models Including:
- Chevrolet Silverado 2500 PICKUP (07): New style (smooth door skin), 6.0L, (next to battery)
- GMC Sierra 2500 PICKUP (07): New style (smooth door skin), 6.0L, (next to battery)
- Chevrolet Express/GMC Savana 1500/2500/3500 (06-14): (RH engine compartment)
- Chevrolet Tahoe/GMC Yukon (07-09): (next to battery)
- Cadillac DTS (06-11): (RH front engine compartment)
- Hummer H3 (08-10): (RH rear engine compartment)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
What does a Transmission Control Module (TCM) do?
What does a Transmission Control Module (TCM) do?
The TCM is the brain of your automatic transmission. It receives data from various sensors and uses it to control shift timing, torque converter lockup, and transmission line pressure for smooth, efficient operation.
Why is VIN programming so important?
VIN programming loads your truck’s specific software, including shift strategies and communication protocols. Without it, a generic module won’t work correctly, leading to the same shifting problems or even new ones. Our pre-programming service ensures 100% compatibility.
Is this part truly plug-and-play?
Yes. Because we program it to your VIN before shipping, no further dealer programming or special tools are required. You can install it yourself and it will function correctly immediately.
Where is the TCM on my 2007 Silverado 2500?
On the 2007 Silverado 2500 (new body style), the TCM is located in the engine compartment, typically mounted on a bracket right next to the battery on the driver’s side.
Do I need to return my old part?
No, there is no core charge for this part. You can keep your old module, which saves you the time and expense of shipping it back.