Restore Peak Performance to Your 2006 GMC Envoy XL
Is your 2006 GMC Envoy XL suffering from erratic shifting, delayed gear engagement, or a frustrating “limp mode”? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every shift with precision. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This OEM-quality T42 TCM, service number 24243921, is the definitive solution to get your vehicle back on the road, shifting smoothly and reliably.
From the Diagnostic Bay
We recently had a 2006 Envoy XL come into the shop with a P0700 code and what the owner described as “violent” shifts from 1st to 2nd gear. They had already replaced two shift solenoids based on a generic code reader’s suggestion, with no improvement. After a quick scan with our professional equipment, we saw communication errors between the ECM and the TCM. The issue wasn’t the solenoids themselves, but the module failing to command them correctly. Installing a VIN-programmed T42 TCM like this one solved the problem in under 30 minutes, saving the customer from further unnecessary parts and labor.
Symptoms of a Failing T42 TCM
A faulty TCM can manifest in various ways, often being misdiagnosed as an internal transmission failure. If you’re experiencing any of the following, your TCM is the likely culprit:
- ✔ Harsh or erratic shifting patterns, including banging into gear or delayed shifts.
- ✔ The vehicle is stuck in a single gear (often 2nd or 3rd), a condition known as “limp mode.”
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-specific codes.
- ✔ Inability to upshift or downshift, leading to poor acceleration and performance.
- ✔ A noticeable decrease in fuel efficiency as the transmission operates incorrectly.
- ✔ Intermittent electrical problems that seem to have no other source.
Why Choose Our Pre-Programmed 2006 Envoy XL Transmission Module?
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 your vehicle’s VIN during checkout, we program the module with the latest GM software updates specific to your 2006 Envoy XL. This ensures perfect communication between the TCM, the engine computer, and the transmission itself, restoring factory performance right out of the box.
Key Benefits:
- Plug-and-Play Installation: No trips to the dealership for costly programming. Simply install the module, connect the wiring, and you’re ready to go.
- Enhanced Reliability: Built to strict OEM standards, this module corrects common factory flaws and ensures long-lasting durability for daily driving and demanding situations.
- Cost-Effective Repair: Avoid the high costs of dealership parts and labor. This solution provides a high-quality component at a fraction of the price.
- No Core Charge: Keep your old part without the hassle or expense of returning a core.
Installation and Compatibility
For the 2006 GMC Envoy XL, the TCM is typically located in the engine compartment on the left-hand (driver’s) side. Installation is a straightforward process that can be completed with basic hand tools in under an hour. Always disconnect the battery before beginning the replacement to ensure safety and help reset the vehicle’s electronic systems. After installation, it’s recommended to use a scan tool to clear any stored DTCs.
This module is a direct replacement for a wide range of part numbers, including: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24252114, 24255280, 24256960, and more.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We pre-program the module to your vehicle’s specific VIN before shipping. This makes it a true plug-and-play solution, saving you time and the high cost of dealership programming.
What is the installation location on a 2006 Envoy XL?
On the 2006 Envoy XL, the Transmission Control Module is located in the engine compartment, typically on the driver’s side (LH side).
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the ECM to turn on the check engine light. While this module often resolves the root cause that triggers the P0700, you should always diagnose any other codes that are present to ensure a complete repair.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the process for you.
How do I provide my VIN for programming?
You can enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure correct programming for your 2006 Envoy XL.