Are you experiencing frustrating and unpredictable shifting in your truck? A faulty Transmission Control Module (TCM) is often the culprit behind issues like harsh gear changes, getting stuck in limp mode, or seeing that dreaded check engine light. This genuine GM T42 Transmission Control Module, service part number 24256960, is the definitive solution for a wide range of GM vehicles, including the 2007 Sierra 2500. We take the guesswork and hassle out of the repair by pre-programming it to your vehicle’s specific VIN, ensuring a seamless, plug-and-play installation right out of the box.
From the Diagnostic Bay
We recently had a 2007 Sierra 2500 HD towed in that was completely stuck in third gear. The owner, a contractor, was losing money every day his truck was down. The dash was lit up with transmission codes, all pointing to internal solenoid circuit failures. After a quick diagnostic check confirmed the TCM was the issue, we installed one of our VIN-programmed T42 modules. In less than 30 minutes, we had the new module in, cleared the codes, and took it for a test drive. The truck shifted perfectly, just like it did from the factory. The customer was back on the road the same afternoon, avoiding a costly and time-consuming trip to the dealership.
The Direct Solution for Your 2007 Sierra 2500 TCM
The TCM is the brain of your automatic transmission, responsible for calculating shift points, controlling hydraulic pressure, and managing 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 to your transmission. Our VIN-programmed T42 module restores this critical link, using the latest software updates from GM to ensure optimal function and longevity for your 4-speed automatic transmission (4L60E, 4L65E, 4L70E, 4L80E).
Common Symptoms of a Failing Transmission Module
- ✔ Harsh, erratic, or delayed gear shifting that makes driving uncomfortable and unpredictable.
- ✔ Vehicle is stuck in a single gear (limp mode), severely limiting speed and power.
- ✔ The check engine light or a dedicated transmission warning light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ A noticeable decrease in fuel efficiency as the transmission operates inefficiently.
- ✔ Complete loss of communication with the module, preventing the vehicle from shifting at all.
Plug-and-Play Installation with VIN Programming
The single biggest advantage of our T42 TCM is the included VIN programming. Before we ship your part, our technicians flash the module with your truck’s unique Vehicle Identification Number. This process loads the correct factory software and calibrations specific to your vehicle’s configuration. The result? You can install it yourself without needing any special scan tools or a trip to the dealer for expensive programming. Simply locate your old module in the engine bay (often near the battery or air cleaner box), disconnect the battery, swap the part, and reconnect. It’s a straightforward repair that saves you time and money.
This module is a direct replacement for a variety of service numbers, including: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24235732, 24235753, 24240449, and YNXS.
Don’t let a faulty module keep your truck off the road. Restore its performance and reliability with this OEM-quality, pre-programmed 2007 Sierra 2500 TCM. Order today and get back to smooth, confident driving.
Frequently Asked Questions
What does this T42 Transmission Control Module do?
The T42 TCM acts as the central computer for your automatic transmission. It receives data from various sensors on the engine and vehicle, then uses that information to control shift solenoids, regulate hydraulic pressure, and engage the torque converter clutch for smooth, efficient operation.
Is this part difficult to install myself?
For most DIY mechanics, the installation is straightforward. It’s typically located in an accessible spot in the engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job can usually be completed in under 30 minutes.
Will I need to take my truck to a dealer after installation?
No. Because we pre-program the module to your vehicle’s VIN before shipping, no additional programming or “relearning” procedures are required. It is a true plug-and-play solution, saving you the time and expense of a dealership visit.
What happens if I continue driving with a bad TCM?
Continuing to operate a vehicle with a failing TCM can lead to more severe problems. Poor shifting can cause excessive wear on internal transmission components like clutches and bands, potentially leading to a complete transmission failure that is far more expensive to repair.
How do I provide my VIN for programming?
During the checkout process, you will be prompted to enter your vehicle’s 17-digit VIN. Please double-check it for accuracy to ensure the module is programmed correctly for your specific truck.