Stop Guessing and Start Driving with Confidence
When the transmission in your truck or SUV starts failing, your entire day can grind to a halt. Unpredictable shifting, warning lights, or getting stuck in limp mode aren’t just annoyances—they’re serious problems that compromise your vehicle’s reliability. This is the definitive solution: a genuine OEM-quality T42 Transmission Control Module (TCM), pre-programmed specifically to your vehicle’s VIN. This isn’t a generic, one-size-fits-all part. This is a direct-fit, plug-and-play fix designed to restore the crisp, dependable performance you expect from your vehicle. By installing our Programmed T42 Transmission Control Module, you’re not just replacing a part; you’re restoring your peace of mind and getting your vehicle back to work.
Common Symptoms & Your Solution
A faulty TCM can manifest in numerous ways, often mimicking more severe mechanical failures. If you’re experiencing any of the following, this module is the most likely culprit and the most effective solution:
- Harsh or Erratic Shifting: Abrupt, jerky gear changes or a feeling of the transmission slipping between gears.
- Limp Mode Activation: The vehicle is stuck in a single gear (usually 2nd or 3rd) to prevent further damage.
- Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- Warning Lights: A persistent Check Engine Light or dedicated transmission warning light on your dash.
- Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction), P0750-series solenoid codes, and other transmission-related faults.
This module directly addresses these issues by replacing the faulty logic board that controls every aspect of your transmission’s operation, from shift points to torque converter lockup.
Features & Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s exact VIN. This critical step eliminates the need for expensive dealership programming or specialized scan tools, saving you time and money.
- ✔ Restored Transmission Performance: By using the latest GM software updates during programming, this TCM ensures optimal shift strategies, smoother gear changes, and improved fuel efficiency.
- ✔ Dependable, Long-Term Fix: Built to strict OEM standards, this module is engineered to withstand the demanding conditions of daily driving or heavy-duty work, providing a reliable, long-lasting solution.
- ✔ Clear Fault Codes for Good: A new, properly functioning Programmed T42 Transmission Control Module is the correct way to permanently resolve persistent transmission-related DTCs.
- ✔ Broad GM Compatibility: Replaces a wide range of service numbers, including 24252114, 24234503, 24243921, and more, ensuring a perfect match for your application.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Insight on VIN Programming
“As a technician, I’ve seen countless vehicle owners try to save a few dollars with a used or non-programmed TCM from a junkyard. It almost never ends well. These T42 modules are not interchangeable without being flashed to the specific vehicle’s operating system and options. Mismatched programming leads to immediate shifting problems, new error codes, and sometimes even a no-start condition. Getting a pre-programmed unit is the only way to guarantee the job is done right the first time. It turns a potentially complex electronic repair into a simple bolt-in replacement.”
Whether you’re fixing the family Tahoe or keeping your workhorse Sierra on the road, installing this Programmed T42 Transmission Control Module is the smartest, most effective way to solve your shifting problems and drive with confidence. No core charge means you can complete the job without the hassle of sending the old part back.
Frequently Asked Questions
What exactly does ‘VIN-programmed’ mean?
It means we flash the module with your vehicle’s unique 17-digit Vehicle Identification Number (VIN) before shipping. This loads the correct software and calibration files from GM for your specific engine, transmission, and options, making it ready for immediate installation without any further setup.
Do I need to take my vehicle to a dealer after installation?
No. The primary benefit of our service is that the module is fully programmed and ready to go. This completely eliminates the need for a trip to the dealership for costly programming.
Is this the right TCM for my 2007 GMC Sierra 2500?
Yes, this T42 TCM is compatible with the 2007 GMC Sierra 2500 (new body style) with the 6.0L engine. It is also compatible with a wide range of other GM vehicles listed. Always match your part number or consult the fitment list to ensure 100% compatibility.
How difficult is the installation process?
For most DIYers with basic tools, the installation is straightforward and typically takes less than 30 minutes. The module is located in the engine bay. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. We recommend clearing any old codes with a basic scan tool after installation.
What happens if I don’t replace a failing TCM?
Continuing to drive with a faulty TCM can lead to more severe and expensive damage. Poor shifting can cause premature wear on clutches and other internal transmission components, potentially leading to a complete transmission failure that requires a full rebuild or replacement.
Is a core charge required for this part?
No, there is no core charge. You are not required to return your old, faulty module, which simplifies the repair process for you.