Restore Your Vehicle’s Shifting Performance
Is your GM vehicle suffering from harsh, erratic shifts, getting stuck in gear, or displaying a persistent transmission warning light? A faulty Transmission Control Module (TCM) can sideline even the most reliable truck, van, or SUV, causing immense frustration and concern. Get back on the road with confidence with our fully programmed T42 Transmission Control Module, the definitive solution for restoring your vehicle’s original shifting performance and reliability without a costly trip to the dealership.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing TCM is the likely culprit. This module is the direct fix for:
- Harsh, banging, or delayed gear shifts
- The vehicle being stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or Transmission Warning Light illumination
- 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
- Complete loss of transmission electronic control
Installing our pre-programmed GM T42 Transmission Control Module resolves these common electronic failures, restoring the precise communication between your engine and transmission for smooth, predictable operation.
Features & Benefits
- ✔ 100% Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. Simply install it, and you’re ready to go—no expensive dealership programming or special tools required.
- ✔ Restored Drivability: Eliminates harsh shifting, gear hunting, and delayed engagement, providing a smooth and comfortable ride just like the day it left the factory.
- ✔ Cost-Effective Repair: Save hundreds of dollars by avoiding dealership labor and programming fees. This is a straightforward solution for both DIY enthusiasts and professional technicians.
- ✔ Updated GM Software: Programmed with the latest vehicle-specific software from General Motors, ensuring optimal performance, fuel efficiency, and longevity.
- ✔ Built to OEM Standards: Engineered for durability and reliability, this module meets or exceeds original equipment specifications for a perfect fit and function.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: More Than Just a Part
From a diagnostic standpoint, many transmission issues are mistakenly blamed on internal mechanical failures when the root cause is purely electronic. The GM T42 Transmission Control Module is the brain of your automatic transmission, managing dozens of parameters every second. Our VIN-specific programming is critical because it loads the latest GM software updates, which often correct factory shifting tables and resolve electronic issues that even a new, un-programmed module can’t fix. This isn’t just a replacement part; it’s a targeted electronic solution that restores perfect communication between your engine and transmission.
Whether you’re fixing a workhorse Silverado, a family-hauling Tahoe, or a daily-driving Impala, this GM T42 Transmission Control Module is the most reliable and efficient way to solve your transmission problems and get your vehicle back in top condition.
Frequently Asked Questions
What does a VIN-programmed TCM mean for me?
It means the module is ready for immediate installation right out of the box. We use your Vehicle Identification Number (VIN) to load the exact software and calibrations for your specific vehicle, eliminating the need for any additional programming or setup at a dealership. It’s a true plug-and-play solution.
Do I need a mechanic to install this part?
Many of our customers are DIY-ers who successfully install this part themselves. The TCM is typically located in an accessible spot in the engine bay and installation usually takes under 30 minutes. However, if you are not comfortable working on your vehicle, we always recommend seeking professional installation.
Will this fix my specific transmission error code?
This module is the direct solution for a wide range of TCM-related fault codes, including the common P0700 code which indicates a general transmission fault. It also resolves many solenoid-specific codes that are triggered by a failing module. After installation, be sure to clear all codes with a scan tool.
Is a core charge required?
No, there is no core charge for this part. You can keep your old module without the hassle of returning it, saving you time and money.
How do I find the TCM on my vehicle?
The location varies by model but is generally in the engine compartment. Common locations include the LH or RH side of the engine bay, next to the battery, under the air cleaner box, or on the LH strut tower. Your vehicle’s service manual will show the exact location.
What vehicles is this TCM compatible with?
This T42 TCM fits a vast range of 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes many popular models from Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Hummer, and Saab. Please check the fitment list on this page to confirm compatibility.