If you’re dealing with a 2007-2013 Silverado 1500 that’s shifting erratically, getting stuck in gear, or throwing transmission codes, you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Transmission Control Module (TCM) can bring a perfectly good truck to a standstill. The T42 TCM is the electronic brain of your 4L60E, 4L65E, or 4L70E automatic transmission, and when it fails, it creates a host of frustrating and potentially damaging problems. This isn’t just a part; it’s the definitive solution to restore your truck’s performance and reliability.
This replacement T42 module, part number 24239224, arrives at your door fully programmed to your truck’s specific Vehicle Identification Number (VIN). This is the crucial step that sets our modules apart. It means no expensive trips to the dealership for programming, no special scan tools required for setup—just a straightforward installation that gets you back on the road. We handle the complex part so you can focus on the fix.
Is Your Silverado Exhibiting These Transmission Issues?
A faulty TCM can manifest in several ways. Over the years, I’ve diagnosed hundreds of these failures, and the symptoms are often consistent. Check if your truck is showing any of these signs:
- ✔ Harsh, banging shifts or erratic gear changes that happen without warning.
- ✔ The truck feels stuck in one gear (often 2nd or 3rd), a condition known as “limp mode.”
- ✔ Your Check Engine Light or a transmission-specific warning light is on.
- ✔ You’ve scanned for codes and found DTCs like P0700 (Transmission Control System Malfunction) or various solenoid-related codes (e.g., P0751, P0756).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable drop in fuel economy or the transmission seems to be overheating.
From the Diagnostic Bay: The Case of the Heat-Soaked TCM
I remember a 2011 Silverado 1500 that came into my shop with a maddeningly intermittent problem. The owner said it drove perfectly fine when cold, but after 20-30 minutes of driving, especially in traffic, it would start slamming into gear and eventually go into limp mode. He’d already replaced a shift solenoid with no luck. After connecting my scanner and monitoring live data, I noticed the TCM would start sending erratic commands once the engine bay got hot. These modules are often mounted right next to the battery, where they bake in engine heat. Over time, this thermal stress causes internal circuits to fail. We installed a VIN-programmed TCM, and the problem was solved permanently. It’s a classic failure mode for these units.
DIY Installation: Get Your Truck Shifting Smoothly in Under 30 Minutes
Replacing the 2007-2013 Silverado 1500 TCM is a job most DIYers can handle with basic tools. Because our module is pre-programmed, you skip the hardest part of the process. For most Silverado models of this generation, the TCM is located in the engine compartment, right next to the battery.
- 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: Find the TCM, typically a silver box with electrical connectors, mounted next to the battery or on the driver’s side of the engine bay.
- Disconnect and Remove: Carefully unclip the electrical connectors. Use a socket wrench to remove the bolts or nuts holding the module bracket in place.
- Install the New Module: Mount your new, VIN-programmed TCM in the same location and securely fasten it. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD-II scanner to clear any stored fault codes from the vehicle’s memory. Start the truck and enjoy smooth, crisp shifting.
Verified Vehicle Compatibility List
While this page is focused on the Silverado, this T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24239224, and more. Please verify your specific model below:
- Chevrolet Silverado 1500 Pickup (2007-2013): Located next to battery. (For 2007, fits new body style with smooth door skin).
- Chevrolet Tahoe / Suburban / Avalanche (2007-2009): Located next to battery.
- GMC Sierra 1500 Pickup (2007-2013): Located next to battery. (For 2007, fits new body style with smooth door skin).
- GMC Yukon / Yukon XL (2007-2009): Located next to battery.
- Chevrolet Express / GMC Savana Vans (2006-2014): Located in RH engine compartment.
- …and many other GM cars, trucks, and SUVs from 2006-2014. See the full fitment list for details.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. This module is delivered to you pre-programmed using your vehicle’s VIN. This ensures it works correctly right out of the box, saving you hundreds in dealership fees and programming time.
Is there a core charge for my old part?
Absolutely not. We don’t require you to send back your old, faulty module. There is no core charge, making the transaction simple and hassle-free.
What tools do I need for the installation?
You’ll only need basic hand tools. A socket set (typically 10mm or 13mm sockets) to remove the mounting bolts and a flathead screwdriver to help release the connector clips is usually all that’s required.
Will this fix a P0700 trouble code on my Silverado?
A P0700 code is a general code indicating the TCM has detected a fault. In many cases where the TCM itself is the source of the problem (due to internal failure), replacing it with this programmed module will resolve the P0700 code and any related specific codes.