Is Your Sierra 2500’s Transmission Letting You Down?
When your 2007 GMC Sierra 2500 is your livelihood, you can’t afford the downtime caused by a faulty transmission control module. Erratic shifting, getting stuck in gear, or a persistent check engine light can sideline your workhorse, costing you time and money. This pre-programmed T42 Transmission Control Module (TCM) is the direct-fit, no-hassle solution to restore the dependable, heavy-duty performance you rely on every single day.
Common Symptoms & Your Solution
A failing TCM can manifest in several frustrating ways. If you’re experiencing any of the issues below, this module is the definitive fix. It directly addresses the electronic brain of your transmission, putting an end to guesswork and restoring proper function. This is the most reliable way to get your 2007 GMC Sierra 2500 T42 TCM operating like new again.
- Harsh, banging shifts or delayed gear engagement
- Vehicle stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift correctly
- Poor fuel economy and potential transmission overheating
Features & Benefits
- ✔ VIN Programmed for Your Truck: We program this module to your vehicle’s specific VIN before it ships. This means it’s a true plug-and-play solution, requiring no expensive trip to the dealership for additional programming.
- ✔ Restore Smooth Shifting: By precisely controlling shift points, line pressure, and torque converter lockup, this module eliminates harshness and restores the smooth, predictable operation your transmission was designed for.
- ✔ Eliminate Annoying Warning Lights: A properly functioning TCM resolves the root cause of many transmission-related DTCs, allowing you to clear the codes and keep them off for good.
- ✔ Built for Durability: Engineered to meet or exceed OEM specifications, this module is built to withstand the demanding conditions of a work truck, ensuring long-term reliability.
- ✔ Guaranteed Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Why is VIN programming so important for a 2007 GMC Sierra 2500 T42 TCM? Unlike a simple sensor, the TCM contains complex software tailored to your truck’s specific engine, axle ratio, and tire size. Generic, non-programmed modules often cause more problems than they solve, leading to incorrect shift patterns and even transmission damage. Our process ensures the module arrives with the latest GM software updates for your exact vehicle, guaranteeing optimal communication between the engine and transmission from the moment you plug it in.
Installation is straightforward for anyone with basic mechanical skills and can typically be completed in under 30 minutes. On your Sierra, the module is conveniently located next to the battery in the engine compartment. Simply disconnect the battery, swap the modules, and reconnect. By purchasing a properly programmed 2007 GMC Sierra 2500 T42 TCM, you are investing in a reliable, long-term solution that gets your truck back to work, fast.
Frequently Asked Questions
What does a VIN-programmed TCM mean?
It means we load the module with the specific software and calibration files from General Motors that match your truck’s unique Vehicle Identification Number (VIN). This ensures perfect compatibility and performance without any need for dealer intervention.
Is this a difficult part to install on my 2007 Sierra 2500?
No, it’s a very straightforward installation. The TCM is located next to the battery. You will need basic hand tools to disconnect the battery and unbolt the module. Since it’s pre-programmed, there are no complicated electronic steps required.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the Engine Control Module (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, you should always diagnose any other specific codes (like for solenoids) that are present.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module, which saves you the time and hassle of shipping it back.
How do I know this is the correct part for my truck?
This T42 TCM is the correct module for the 2007 GMC Sierra 2500 with the 6.0L engine. It is also a direct replacement for multiple part numbers, including 24252114, 24242391, and 24234503. Providing your VIN at checkout guarantees we send you a perfectly matched part.