Restore Peak Transmission Performance in Your 2006 Envoy XL
Is your 2006 GMC Envoy XL suffering from erratic shifting, getting stuck in gear, or displaying a persistent check engine light? 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 monitoring system health. When it fails, it can disrupt your vehicle’s performance and reliability. This OEM-quality T42 Transmission Control Module, part number 24241806, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a seamless, plug-and-play installation.
From the Diagnostic Bay
We had a customer bring in a 2007 Trailblazer—a close cousin to the Envoy XL—with a very frustrating problem. The truck would shift hard from first to second gear when cold, but the issue would disappear once it warmed up. They had already replaced two shift solenoids with no luck. After scanning the vehicle, we found a generic P0700 transmission fault code but no specific solenoid codes. This pointed us toward the module itself. Instead of a costly diagnostic path, we installed a VIN-programmed 2006 Envoy XL Transmission Module (which is compatible). The pre-programmed unit immediately corrected the faulty logic causing the cold-shift issue. The customer was back on the road in under an hour, saving hundreds on dealership programming fees and further guesswork.
Is Your Envoy XL Exhibiting These Symptoms?
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, or other solenoid-related faults are present.
- ✔ Failure to upshift or downshift properly, leading to poor acceleration.
- ✔ A noticeable decrease in fuel economy.
- ✔ Complete loss of transmission engagement.
The Superior Solution: VIN-Programmed and Ready to Install
Don’t settle for a generic module that requires a trip to the dealer for expensive programming. This T42 TCM is meticulously programmed using the latest GM software updates matched directly to your Envoy XL’s VIN. This critical step ensures that all shift points, pressure controls, and communication protocols are perfectly calibrated for your specific vehicle configuration right out of the box. This not only restores original performance but also resolves many common DTCs that a non-programmed module cannot. Built to strict OEM standards and backed by a one-year warranty, this module provides a dependable and lasting repair for your transmission woes.
Simple Installation for DIY and Professionals
Replacing the 2006 Envoy XL Transmission Module is a straightforward job. On your Envoy XL, the TCM is typically located in the engine compartment on the driver’s side (LH). Always disconnect the battery before beginning the installation to allow the vehicle’s systems to reset. After swapping the module, reconnect the battery and use a standard OBD2 scan tool to clear any stored fault codes. Best of all, there is no core charge, so you can keep your old part without any hassle.
Frequently Asked Questions
What does a Transmission Control Module do on my Envoy XL?
The TCM acts as the central computer for your automatic transmission. It processes data from various sensors (like vehicle speed and engine RPM) to control shift solenoids, regulate hydraulic pressure, and ensure smooth, efficient gear changes for optimal performance and fuel economy.
Is this TCM really plug-and-play?
Yes. By providing your vehicle’s VIN during checkout, we program the module specifically for your 2006 GMC Envoy XL. This means it will communicate correctly with your vehicle’s other computers, like the ECM, without needing any additional programming from a dealership.
Where is the TCM located on a 2006 GMC Envoy XL?
On the 2006 Envoy XL, the Transmission Control Module is generally found in the engine compartment on the left-hand (driver’s) side. Always confirm the location before beginning work, as it can vary slightly based on engine type.
Will this part fix transmission error codes like P0700?
A faulty TCM is a very common cause of code P0700 (Transmission Control System Malfunction) and related solenoid codes. Replacing a failing module with this pre-programmed unit will resolve the issue if the module itself is the root cause of the fault.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep, recycle, or dispose of your old module at your convenience, making the replacement process simpler and more affordable.