Is Your 2006 GMC Envoy XL Shifting Erratically?
If you’re experiencing harsh shifts, delayed gear engagement, or your vehicle is stuck in limp mode, a failing transmission control module (TCM) is the most likely culprit. The TCM is the brain of your automatic transmission, responsible for managing shift points, torque converter lockup, and line pressure. When it fails, it can cause a cascade of frustrating and potentially damaging issues, often illuminating the check engine light with codes like P0700.
This replacement T42 Transmission Control Module, part number 24239926, is the definitive solution for restoring your vehicle’s transmission performance. We pre-program each module to your vehicle’s specific Vehicle Identification Number (VIN), ensuring it arrives ready for a straightforward, plug-and-play installation. This eliminates the need for expensive dealership programming, saving you time and money.
Expert Pro Tip
Before installing your new TCM, disconnect the vehicle’s battery for at least 15 minutes. This helps reset the vehicle’s adaptive learning parameters and ensures the new module can establish fresh communication with the Powertrain Control Module (PCM) and other vehicle systems for optimal performance from the start.
Symptoms of a Failing Transmission Control Module
- ✔ Harsh, erratic, or delayed gear shifts that disrupt driving comfort.
- ✔ Vehicle entering “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light illuminated on the dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- ✔ Inability to upshift or downshift properly, leading to poor acceleration.
- ✔ Noticeable decrease in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the module, preventing the vehicle from starting or shifting out of park.
The Definitive Solution: A Pre-Programmed 2006 Envoy XL TCM
Don’t settle for unpredictable transmission behavior. This module is engineered to meet or exceed original equipment standards, providing a reliable and long-lasting repair. The key benefit is our complimentary VIN programming service. By providing your VIN at checkout, we load the latest GM software specific to your 2006 Envoy XL. This ensures that all shift strategies and electronic parameters are perfectly matched to your vehicle’s factory specifications, restoring the smooth, crisp shifting you expect.
This module is a direct replacement for a wide range of GM vehicles from 2006-2014 equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, and more, making it a versatile solution for many models from Chevrolet, GMC, Buick, Cadillac, and others.
Frequently Asked Questions
What is VIN programming and why is it essential?
VIN programming is the process of loading your vehicle’s unique software and calibration files onto the module. This is critical for the TCM to communicate correctly with your vehicle’s engine computer and other systems. Our pre-programming service makes the part plug-and-play, avoiding a costly trip to the dealership for setup.
Can I install this module myself?
Yes, installation is generally straightforward for those with basic mechanical skills. On the 2006 Envoy XL, the TCM is typically located in the left-hand (driver’s side) engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job can often be completed in under 30 minutes.
Will this fix transmission-related error codes like P0700?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module will resolve the issue if the TCM itself is faulty, it’s important to ensure other components like solenoids and wiring are in good condition. Replacing a failed TCM is the most common fix for these types of codes.
Is there a core charge for this part?
No, we do not require a core charge. You can keep your old part, eliminating the hassle and expense of shipping it back.
How can I be sure this fits my vehicle?
This part is confirmed to fit the 2006 GMC Envoy XL. It also fits a wide range of other GM vehicles listed in the compatibility chart. The best way to ensure a perfect match is to compare the part number 24239926 (or an interchangeable number) with the one on your existing module.