Restore Peak Transmission Performance in Your GM Truck or SUV
Is your 2007-2013 GMC Sierra 1500, Chevrolet Silverado, or other compatible GM vehicle suffering from erratic shifting, getting stuck in gear, or displaying transmission-related warning lights? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can mimic the symptoms of a catastrophic mechanical failure, leading to drivability issues and potential damage if left unaddressed.
This genuine OEM-quality T42 Transmission Control Module, service number 24256960, is the definitive solution. It arrives expertly pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN), eliminating the need for expensive dealership visits for programming. This plug-and-play module ensures seamless integration with your vehicle’s systems, restoring the smooth, reliable shifting you expect from your truck.
From the Diagnostic Bay
We recently had a 2011 Silverado 1500 towed in. The owner was convinced his 4L60E transmission was shot. It was slamming into gear and would often get stuck in 3rd (limp mode), with the check engine light on. A quick scan revealed a P0700 (Transmission Control System Malfunction) and several solenoid circuit codes. Instead of quoting a multi-thousand dollar transmission rebuild, we checked the TCM. After confirming the wiring was intact, we installed one of these VIN-programmed T42 modules. In under 30 minutes, the codes were cleared, and the truck was shifting perfectly on the test drive. The customer saved a fortune and was back on the road the same day, all thanks to replacing the correct electronic component.
Signs Your 2007-2013 Sierra 1500 TCM is Failing
A faulty TCM can manifest in various ways, often intermittently at first. If you’re experiencing any of the following symptoms, your transmission control module is the likely culprit. Replacing it can prevent further wear and tear on your transmission’s mechanical components.
- ✔ Harsh or Erratic Shifting: Abrupt, jerky gear changes or unpredictable shifting patterns during acceleration or deceleration.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (usually 2nd or 3rd) to protect the transmission from further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700, P0750, or other specific solenoid-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation can lead to a sudden drop in MPG.
- ✔ No Communication: A scan tool may be unable to communicate with the transmission module, indicating a complete failure.
The Plug-and-Play Advantage: VIN Programming Included
The single biggest hurdle when replacing modern electronic modules is programming. This T42 TCM completely solves that problem. We use the latest GM software updates to program the module to your exact VIN before it ships. This ensures that all factory shift points, torque converter strategies, and vehicle-specific settings are perfectly calibrated for your truck. Simply install the module, connect the harnesses, and you’re ready to go. No additional tools or dealership intervention is required.
Simple Installation for DIY and Professionals
Installation is straightforward and can typically be completed in under an hour with basic hand tools. Depending on your specific GM model, the TCM is located in the engine bay—often next to the battery, on the LH strut tower, or under the air cleaner box. We recommend disconnecting the vehicle’s battery before starting the removal and installation process. Once the new module is installed, reconnect the battery and use a basic OBD2 scan tool to clear any stored diagnostic trouble codes. With no core charge, you can keep your old part without the hassle of returning it.
This module is a direct replacement for a wide range of part numbers, including 24252114, 24234503, 24230461, and 24256960, among others. It is compatible with numerous 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Restore the integrity and performance of your transmission with this reliable, pre-programmed control module.
Frequently Asked Questions
Do I need to take this part to the dealer for programming?
No. This Transmission Control Module comes pre-programmed to your vehicle’s VIN. You provide the VIN during checkout, and we handle all the programming before shipping. This makes it a true plug-and-play solution.
What is the difference between a TCM and an ECM?
The TCM (Transmission Control Module) specifically controls the functions of the automatic transmission. The ECM (Engine Control Module) manages the engine’s performance. They work together, but a faulty TCM will cause shifting and transmission-related issues, while a faulty ECM will cause engine running problems.
Is this compatible with my 2008 Chevrolet Tahoe?
Yes, this T42 TCM is compatible with a wide range of 2006-2014 GM vehicles, including the Chevrolet Tahoe, Silverado, Suburban, GMC Yukon, and Sierra, among many others listed in the fitment data. Always verify your vehicle’s model and year for a perfect match.
What happens if I don’t replace a failing TCM?
Continuing to drive with a faulty TCM can lead to severe damage to your transmission’s internal mechanical parts. Poorly timed shifts and incorrect hydraulic pressure can burn clutches and damage hard parts, potentially turning a simple electronic fix into a costly transmission rebuild.
Do I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set and ratchet are typically all that’s needed to access and replace the module in the engine compartment. We do recommend having an OBD2 scan tool to clear any fault codes after installation.