Restore Peak Performance to Your Chevrolet Silverado 2500
If your 2007 Silverado 2500 is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the problem is often a failing Transmission Control Module (TCM). As a seasoned technician, I’ve seen firsthand how a faulty TCM can sideline a perfectly good work truck. This T42 series module, part number 24235340, is the definitive solution, arriving pre-programmed to your truck’s specific VIN. This means no expensive trips to the dealership for programming—it’s a true plug-and-play fix that restores the crisp, reliable shifting you depend on.
The TCM is the electronic brain of your automatic transmission, controlling everything from shift points to torque converter lockup. When it fails, communication between the engine and transmission breaks down, leading to poor performance, decreased fuel economy, and potential long-term damage. Our module is built to strict OEM specifications, ensuring it communicates flawlessly with your vehicle’s systems, clearing persistent diagnostic trouble codes (DTCs) and preventing future issues.
A Technician’s Notebook: The Intermittent Limp Mode Nightmare
I once had a 2007 Silverado 2500 in my bay that was a real head-scratcher. The owner, a contractor, said it would randomly go into limp mode (stuck in 3rd gear) on his way to a job site, but only after it was fully warmed up. He’d already replaced a shift solenoid with no luck. We checked wiring, fluid, and pressures—all perfect. On a hunch, we monitored the TCM data stream. Sure enough, as the engine bay heated up, the TCM started sending erratic signals before cutting out completely. Heat soak was causing an internal failure. We installed a VIN-programmed 2007 Silverado 2500 TCM, and the problem was solved instantly. It saved him from potentially replacing the whole transmission.
Is Your Silverado Showing These Telltale 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:
- ✔ Unpredictable or harsh gear shifts.
- ✔ The vehicle is stuck in “limp mode” and won’t shift out of a single gear.
- ✔ Check Engine Light is on with transmission-related codes like P0700, P0750, or other solenoid circuit faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A sudden drop in fuel efficiency.
- ✔ The transmission feels like it’s slipping between gears.
A Straightforward Guide to Your TCM Installation
Replacing your 2007 Silverado 2500 TCM is a simple job that most DIYers can complete in under 30 minutes with basic hand tools. This module is typically located in the engine bay, next to the battery.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and help reset the vehicle’s computer systems.
- Locate the Old Module: Find the TCM mounted next to the battery. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that may need to be pressed or lifted. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD-II scanner to clear any stored fault codes. Start the truck and enjoy smooth shifting!
Confirmed Vehicle Compatibility List
This T42 Transmission Control Module is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the 2007 Silverado 2500 TCM, it is also compatible with the following models and interchanges with part numbers 24252114, 24234503, 24230461, 24234274, 24235754, and more.
- Chevrolet Silverado 2500 Pickup (2007): New style (smooth door skin), 6.0L, (next to battery)
- Chevrolet Silverado 1500 Pickup (2007-2013): (next to battery)
- GMC Sierra 2500 Pickup (2007): New style (smooth door skin), 6.0L, (next to battery)
- Chevrolet Tahoe / GMC Yukon (2007-2009): (next to battery)
- Chevrolet Express / GMC Savana Vans (2006-2014): (RH engine compartment)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take my truck to the dealer after installing this TCM?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play solution that does not require any additional programming or flashing from a dealership, saving you time and money.
What is a T42 TCM?
The T42 is the specific hardware platform name for this generation of General Motors Transmission Control Module. It was used across a wide variety of vehicles with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E.
Will this part fix a P0700 trouble code?
A P0700 code is a generic request from the TCM to turn on the Check Engine Light. Often, a failing TCM is the root cause. While this part will resolve the issue if the module itself is faulty, you should always scan for other, more specific codes (like P0750-P0758 for solenoids) to confirm the diagnosis.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, making the replacement process even simpler.