Is your truck or van suffering from harsh, erratic shifting, or stuck in limp mode? A faulty Transmission Control Module (TCM) is often the culprit, leaving your reliable vehicle sidelined. Get back on the road quickly with this direct-fit, VIN-programmed T42 Transmission Control Module. Designed specifically for a wide range of 2006-2014 General Motors vehicles, this module is the definitive solution to restore the crisp, smooth shifting and dependable performance you rely on every day.
Common Symptoms & Your Solution
A failing TCM can cause a host of frustrating and potentially damaging issues. If you’re experiencing any of the following, this module is your answer:
- Harsh, banging shifts or delayed gear engagement
- Vehicle is stuck in one gear (often called “limp mode”)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift properly
- Poor fuel economy and a feeling of lost power
Instead of paying for expensive dealership diagnostics and programming fees, our programmed T42 transmission control module arrives ready for a straightforward, plug-and-play installation, getting you back to work with minimal downtime.
Features & Benefits
- ✔ 100% VIN Programmed: We program the module to your vehicle’s specific VIN before shipping. This ensures perfect communication with your vehicle’s other computers for optimal shift points, torque converter lockup, and fuel efficiency right out of the box. No extra trips to the dealer are required.
- ✔ Restores Smooth Operation: Eliminates common transmission problems like slipping, harsh shifting, and erratic behavior, making your vehicle drive like new again.
- ✔ Plug-and-Play Installation: Designed for a direct fit and easy installation, typically in under 30 minutes. Simply disconnect the battery, swap the module, and reconnect.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for durability and long-term reliability, ensuring it can handle the demands of a work truck or daily driver.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core, saving you time and money.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
Expert Insight: The Power of Pre-Programming
In modern vehicles, the TCM is the brain of the transmission, constantly communicating with the engine computer (ECU) and other systems. When you install a generic, non-programmed module, it’s like introducing a stranger into a conversation—it doesn’t know the vehicle’s specific ‘language’ or requirements. That’s why dealership programming is usually required. Our process eliminates that step entirely. By programming the module with the latest GM software and your vehicle’s unique VIN, we ensure it’s a perfect match from the moment you plug it in. This not only saves you hundreds of dollars but guarantees the transmission operates exactly as the manufacturer intended, protecting it from premature wear and restoring factory performance.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load the module with the specific software and calibration files from General Motors that match your vehicle’s unique 17-digit Vehicle Identification Number (VIN). This ensures it works perfectly with your engine, axle ratio, and tire size for precise shifting and performance, eliminating the need for any additional programming after installation.
Is this part difficult to install myself?
For most DIYers with basic tools, this is a straightforward job. The TCM is typically located in the engine bay and is easy to access. The process involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in the reverse order. Most installations take less than 30 minutes.
Will this fix my transmission codes like P0700?
Yes, a faulty TCM is a very common cause for a P0700 trouble code (Transmission Control System Malfunction) as well as various solenoid-specific codes. Replacing your failing unit with this pre-programmed T42 transmission control module is the correct fix for these issues in most cases. After installation, be sure to clear any old codes with a scan tool.
Do I need to send my old part back?
No, there is no core charge or requirement to return your old module. You can dispose of it or keep it, saving you the time and shipping costs associated with core returns.
How do I know if this module fits my vehicle?
This module fits a very wide range of 2006-2014 GM vehicles, including the Savana, Express, Silverado, Sierra, Tahoe, Yukon, and many more. Please check the detailed fitment list on this page or match your original part number to the interchange numbers provided to confirm compatibility.