Get Your Silverado Shifting Smoothly Again
If your 2007 Chevrolet Silverado 2500 is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the problem is very likely a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM dictates every gear change and lockup command. When it fails, it can cripple your truck’s performance and reliability. This OEM-quality T42 TCM, part number 24239926, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay: The Work Truck That Wouldn’t Shift
A customer brought in his ’07 Silverado 2500 work truck, complaining it was stuck in what felt like third gear—a classic case of ‘limp mode.’ The check engine light was on, and my scan tool pulled a P0700 (Transmission Control System Malfunction). In my 20+ years, I’ve seen this hundreds of times on these GM trucks. The original T42 modules are prone to internal circuit failure from heat and vibration. Instead of a costly and time-consuming trip to the dealership for a new module and programming, we installed one of our VIN-programmed units. In under an hour, the truck was shifting perfectly, codes were cleared, and the customer was back on the road to his next job. This isn’t just a part; it’s a fast, reliable fix that prevents downtime.
Is Your Silverado Exhibiting These Telltale Signs?
A faulty TCM can manifest in several ways, often starting intermittently before becoming a constant problem. If you’re experiencing any of the following, it’s time to inspect your 2007 Silverado 2500 TCM.
- ✔ 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-P0758 (solenoid codes), or U0101.
- ✔ Poor acceleration and a sudden drop in fuel economy.
- ✔ The transmission seems to slip between gears or fails to go into reverse.
A Straightforward Guide to Installation
Replacing the TCM on your Silverado is a job most DIYers can handle in their own driveway with basic tools. No complex procedures or dealer visits are required.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the 2007 Silverado 2500 (new body style), the TCM is typically located in the engine bay, mounted in a bracket right next to the battery.
- Disconnect and Remove: Carefully unplug the large electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place and securely plug in the electrical connectors until they click.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While our programming resolves most issues, it’s good practice to use a basic scan tool to clear any stored historical codes.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles. While this page is focused on the 2007 Silverado 2500 TCM, please verify your model and specific options below. This part is interchangeable with service numbers 24234503, 24252114, 24239926, and more.
Partial Fitment List:
- CHEVROLET SILVERADO 2500 PICKUP 07: Transmission; new style (smooth door skin), 6.0L, (next to battery)
- GMC SIERRA 2500 PICKUP 07: Transmission; new style (smooth door skin), 6.0L, (next to battery)
- CHEVROLET AVALANCHE 1500 07-08: Transmission; (next to battery)
- CHEVROLET EXPRESS/GMC SAVANA VANS 06-14: Transmission; (RH engine compartment)
- CHEVROLET TAHOE/GMC YUKON 07-09: Transmission; (next to battery)
- HUMMER H3 08-10: Transmission; (RH rear engine compartment)
- …and many more GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This module comes fully programmed to your vehicle’s VIN number. It is ready for installation right out of the box, saving you hundreds of dollars in dealership programming fees.
Will this fix a P0700 transmission code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a faulty TCM is the root cause, and replacing it with this module will resolve the issue and allow the code to be cleared.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, tested for performance and backed by a one-year warranty. It is not a used part pulled from a junkyard.
What’s the difference between a TCM and a PCM/ECM?
The TCM (Transmission Control Module) specifically controls automatic transmission functions. The PCM (Powertrain Control Module) or ECM (Engine Control Module) manages engine performance. In many modern vehicles, these functions are integrated, but for this application, the TCM is a separate, dedicated computer for your transmission.
Is there a core charge for my old module?
No, there is no core charge. You can keep your old part without any extra fees or hassle, making the repair process simpler and more affordable.
Don’t let a faulty TCM sideline your truck. Restore the crisp, reliable shifting your Silverado 2500 was built for. Order your pre-programmed 2007 Silverado 2500 TCM today and get back to work with confidence.