Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006 GMC Envoy XL suffering from erratic shifting, getting stuck in gear, or displaying transmission-related warning lights? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can cause a cascade of frustrating and potentially damaging issues. This genuine OEM-quality T42 Transmission Control Module, service part number 24255280, is the definitive solution, pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay
We had a 2007 Chevy Tahoe come in with a P0700 code and what the owner described as ‘violent’ shifting between first and second gear. Another shop had already replaced two shift solenoids with no improvement. After hooking up our scanner, we saw erratic data from the TCM. Instead of throwing more parts at it, we installed one of our VIN-programmed T42 modules. The installation took less than 20 minutes. After a quick battery disconnect to clear the adaptive memory, the Tahoe was shifting like it just rolled off the factory floor. It’s a reminder that sometimes the root cause is the controller, not the components it’s controlling.
Symptoms of a Failing T42 TCM
- ✔️ Harsh, delayed, or unpredictable gear shifts.
- ✔️ Vehicle enters ‘limp mode,’ often stuck in 2nd or 3rd gear.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated.
- ✔️ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔️ Failure to upshift or downshift, leading to poor acceleration and fuel economy.
- ✔️ Intermittent loss of communication with the transmission module.
- ✔️ In severe cases, a complete inability to engage any gear.
Why Choose Our Programmed 2006 Envoy XL TCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle in replacing a modern TCM is the need for expensive dealership programming. We eliminate that step entirely. By providing us with your vehicle’s VIN during checkout, we flash the module with the latest GM-certified software specific to your 2006 Envoy XL. This ensures that all shift points, torque converter strategies, and diagnostic parameters are perfectly matched to your vehicle’s factory specifications. This process resolves common software-related DTCs and guarantees optimal performance and longevity right out of the box.
Built to strict OEM standards, this module ensures reliability and durability. It’s a direct replacement for a wide range of part numbers, including 24252114, 24234503, 24230461, and many more, making it a versatile fix for numerous GM trucks, SUVs, and cars from 2006-2014. Whether you’re working on a Chevrolet Silverado, GMC Sierra, Buick LaCrosse, or Hummer H3, this module provides a dependable repair.
Simple, Hassle-Free Installation
Designed for both professional technicians and skilled DIYers, the installation process is straightforward. The module is typically located in the engine compartment—often near the battery, on a strut tower, or under the air cleaner box. The entire replacement can usually be completed in under 30 minutes. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one. Reconnect everything, and you’re ready to go. No core charge means you don’t have to worry about the cost and inconvenience of sending your old part back.
Frequently Asked Questions
Do I need to get this TCM programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s VIN. Simply provide your VIN at checkout, and the module will arrive ready for plug-and-play installation, with no additional programming required.
Where is the TCM located on my 2006 Envoy XL?
On the 2006 GMC Envoy XL, the Transmission Control Module is typically located in the engine compartment on the left-hand (driver’s) side.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the Engine Control Module (ECM) to turn on the Check Engine Light. While a faulty TCM is a very common cause, you should always diagnose any other codes that are present. In many cases where the TCM is the root cause, this part will resolve the P0700 code.
Is this part compatible with other GM vehicles?
Yes, this T42 TCM is compatible with a wide array of GM vehicles from roughly 2006 to 2014 that use 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes models like the Chevrolet Tahoe, Silverado, GMC Sierra, Cadillac DTS, and many more. Please check the fitment list to confirm for your specific vehicle.
What is your warranty policy on this module?
This transmission control module is backed by a one-year warranty, ensuring peace of mind and protecting you against any manufacturing defects.