Is Your GM Truck or SUV Shifting Harshly?
Experiencing sudden, jarring shifts, a check engine light that won’t go away, or your vehicle being stuck in ‘limp mode’ can be incredibly frustrating. These are classic signs that your transmission control module (TCM) has failed. You rely on your vehicle to perform, and a faulty TCM can leave you stranded and facing a costly dealership repair. This VIN-programmed T42 Transmission Control Module is the definitive, hassle-free solution to restore your vehicle’s performance and your peace of mind.
Common Failure Symptoms & Your Direct Solution
A failing T42 TCM can cause a wide range of problems, often misdiagnosed as internal transmission failure. Before considering a costly transmission replacement, check if you’re experiencing any of these common symptoms. This module is designed to resolve them directly:
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes
- Failure to upshift or downshift properly
- Noticeable decrease in fuel economy
- Loss of communication with the TCM
By installing our programmed T42 transmission control module, you are not just replacing a part; you are providing a direct fix for the electronic brain of your transmission, ensuring all shifting commands are executed precisely as the manufacturer intended.
Key Features & Tangible Benefits
- โ 100% VIN Programmed: We program this module to your vehicle’s specific VIN number before it ships. This means it arrives ready for a true plug-and-play installation, with no expensive trips to the dealership for programming required.
- โ Restored Performance: By installing a correctly calibrated module, you’ll eliminate harsh shifting and restore the smooth, predictable performance your vehicle had when it was new.
- โ Solve Annoying Warning Lights: This module is engineered to resolve the root electrical cause of many transmission-related DTCs, allowing you to finally clear that persistent check engine light.
- โ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring reliable operation and longevity for everything from daily driving to heavy-duty work in a Sierra or Savana.
- โ Broad Compatibility: A direct replacement for a wide range of GM vehicles from 2006-2014, including popular models like the Tahoe, Silverado, Impala, and Yukon. Interchangeable with part numbers 24252114, 24234503, 24242391, and more.
- โ This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Why is VIN programming so important? A modern transmission has dozens of subtle calibration differences between models, engines, and even axle ratios. A generic, unprogrammed module from a parts store simply cannot account for this. It might shift, but it won’t shift correctlyโleading to premature wear on clutches and solenoids. Our process ensures your new programmed T42 transmission control module has the exact software from GM for your specific vehicle, guaranteeing optimal shift points, torque converter lockup, and fuel efficiency. It’s the difference between a temporary fix and a long-term, reliable repair.
Frequently Asked Questions
Is this TCM really plug-and-play?
Yes. Because we program the unit to your vehicle’s specific VIN before shipping, it is ready to be installed without any further programming. Simply disconnect the battery, swap the module, and reconnect the battery. We recommend clearing any old codes with a scan tool after installation.
How do I provide my VIN for programming?
After placing your order, you will be prompted to provide your 17-digit Vehicle Identification Number (VIN). Our technicians use this to load the latest GM-certified software for your exact vehicle configuration.
Do I need to return my old TCM (core charge)?
No, there is no core charge for this part. You can keep your old module, which saves you the time and hassle of packaging and shipping it back.
What tools are needed for installation?
Installation is typically straightforward and requires basic hand tools, such as a socket set and ratchet. The module is located in the engine compartment, and the entire process usually takes less than 30 minutes.
Will this fix a P0700 trouble code?
A P0700 code is a general code indicating the TCM has detected a fault. While this programmed T42 transmission control module often resolves the underlying issues that trigger a P0700, it’s always best to have the specific transmission codes read to confirm the diagnosis.