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, you’re not just dealing with an annoyance—you’re dealing with a loss of performance and reliability. As a technician with over two decades of experience, I’ve seen countless GM trucks come into the shop with these exact issues. The culprit is almost always a failing Transmission Control Module (TCM). This replacement T42 TCM, part number 24240449, is the definitive solution to restore your truck’s transmission to its factory-correct operation. The best part? It arrives at your door pre-programmed to your truck’s specific VIN, eliminating the need for an expensive trip to the dealership.
From the Diagnostic Bay
I remember a customer with a 2007 Silverado 2500 work truck. It was stuck in what he called ‘first gear,’ but it was actually limp mode (stuck in 3rd). He was losing money every day the truck was down. He’d already replaced a shift solenoid with no luck. A quick scan showed a P0700 code and intermittent communication loss with the TCM. Instead of a costly diagnostic rabbit hole, we installed one of these pre-programmed modules. In less than an hour, the truck was shifting perfectly, all codes were cleared, and he was back on the road. This isn’t just a part; it’s a fast, reliable fix that gets you moving again.
Is Your Truck Showing These Symptoms?
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 to be replaced. A faulty 2007 Silverado 2500 TCM can cripple your vehicle’s drivability.
- ✔ Unpredictable or harsh gear changes, especially when cold.
- ✔ The transmission hesitates to shift or feels like it’s slipping between gears.
- ✔ Your truck is stuck in limp mode, usually in 2nd or 3rd gear, with limited power.
- ✔ The Check Engine Light or a transmission-specific warning light is illuminated.
- ✔ You’ve pulled diagnostic trouble codes (DTCs) like P0700, P0750, P0753, or other solenoid-related faults.
- ✔ A complete loss of communication with the TCM, preventing diagnostics.
A Straightforward Guide to Installation
One of the biggest advantages of this module is its simple, plug-and-play installation. No special tools are required, and most DIYers can complete the job in under 30 minutes. For your 2007 Silverado 2500 HD, the TCM is conveniently located in the engine bay, right next to the battery.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: Open the hood and find the TCM mounted next to the battery on the driver’s side.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock.
- Final Steps: Reconnect the battery terminal. Start the truck and allow it to idle for a few minutes. While not always necessary, using a basic OBD2 scan tool to clear any stored fault codes is a good final step.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24240449 and other interchangeable numbers. It is designed for a wide range of GM vehicles equipped with 4-speed automatic transmissions (4L60E, 4L65E, 4L70E, 4L80E). While this page focuses on the 2007 Silverado 2500 TCM, it also fits the following models:
This part will fit these makes and models with these options
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COLORADO 08-12 Transmission; (RH rear engine compartment)
EXPRESS 1500/2500/3500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 1500/2500/3500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07-09 Transmission; (next to battery)
TRAILBLAZER 06-09 Transmission; (LH engine compartment)
ENVOY 06-09 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
…and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take this to a dealer for programming?
No. This module is fully programmed to your vehicle’s VIN before it ships. It is a true plug-and-play solution, saving you the time and expense of a dealership visit.
What does “VIN Programmed” mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module. This ensures it communicates perfectly with your truck’s engine computer and other systems, delivering optimal shift points and performance.
Is this a new or used part?
This is a high-quality, OEM-spec replacement part that has been expertly tested and programmed. It is backed by our one-year warranty for your peace of mind.
Do I need to send my old TCM back?
No, there is no core charge or need to return your old part. You can dispose of it at your convenience, making the repair process simpler and faster.