Is Your GMC Envoy Shifting Erratically?
If your 2006-2009 GMC Envoy is plagued by harsh shifting, delayed gear engagement, or is stuck in a frustrating ‘limp mode,’ you’re not just dealing with an annoyance—you’re facing a critical component failure. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can make your reliable SUV feel unpredictable and unsafe. Restore the smooth, dependable performance you expect with our direct-fit, VIN-programmed T42 Transmission Control Module.
Common Symptoms & Your Solution
A failing TCM can manifest in numerous ways, often triggering your check engine light and storing diagnostic trouble codes (DTCs). This module is the definitive solution for issues like:
- Sudden, harsh, or jerky gear shifts
- Failure to upshift or downshift properly
- Vehicle stuck in a single gear (limp mode)
- Transmission-related warning lights on the dash
- Error codes such as P0700, P0750, or other solenoid-specific faults
- Poor fuel economy and a feeling of lost power
By replacing your old unit with this pre-programmed 2006-2009 GMC Envoy T42 TCM, you are directly addressing the root cause of these problems, eliminating the guesswork and getting your vehicle back on the road quickly and correctly.
Features & Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your Envoy’s specific Vehicle Identification Number (VIN). This critical step ensures perfect communication between the transmission and the rest of your vehicle, eliminating the need for an expensive trip to the dealership for programming.
- ✔ Restore Smooth Performance: By precisely controlling shift points, line pressure, and torque converter lockup, this T42 TCM brings back the crisp, seamless shifting you remember.
- ✔ Built for Reliability: Engineered to meet and exceed strict OEM specifications, this module is built to withstand the demanding conditions of daily driving, ensuring long-lasting and dependable operation.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
Many sellers offer generic, unprogrammed TCMs, leaving you stranded with a part that won’t work correctly. The T42 module in your GMC Envoy is highly integrated with other vehicle systems. Without programming specific to your VIN, the module won’t have the correct software for your engine size, gear ratios, and tire size. This can lead to persistent shifting issues, incorrect speedometer readings, and even new error codes. Our process ensures the module you receive is loaded with the latest GM software for your exact vehicle, guaranteeing a successful and hassle-free repair. This is the reason our 2006-2009 GMC Envoy T42 TCM is the trusted choice for both DIYers and professional shops.
This module is the ideal solution for a wide range of GM trucks, vans, and SUVs that use the T42 controller for transmissions like the 4L60E, 4L65E, and 4L70E. Don’t let a faulty computer sideline your vehicle. Get the correct, programmed part and restore your transmission’s function and your driving confidence. This is the most reliable way to fix your 2006-2009 GMC Envoy T42 TCM issues for good.
Frequently Asked Questions
What does the T42 TCM actually do?
The T42 Transmission Control Module acts as the dedicated computer for your automatic transmission. It receives data from various sensors on the engine and vehicle, and uses this information to control shift solenoids, regulate hydraulic pressure, and manage torque converter clutch engagement for optimal performance, fuel efficiency, and smooth operation.
Is this part difficult to install on my GMC Envoy?
For most individuals with basic mechanical skills, installation is straightforward. On the 2006-2009 Envoy, the TCM is typically located in the engine compartment on the driver’s side. The process involves disconnecting the battery, unplugging the electrical connectors, and unbolting the module. Since our unit is pre-programmed, no special computer tools are needed for setup.
Will this module fix my specific error codes, like P0700?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the check engine light be turned on. This module is often the solution for a P0700 when accompanied by other transmission-specific codes. By replacing a faulty TCM, you are fixing the source of these codes.
Do I need to send my old module back?
No. We do not require a core return for this part. You can keep your old module, which saves you the time, cost, and hassle of shipping it back.
How do I provide my VIN for programming?
After you place your order, we will provide simple instructions for you to send us your vehicle’s 17-digit VIN. Our technicians will then program the module before it is shipped, ensuring it’s ready for installation right out of the box.