If you’re dealing with the headaches of a faulty transmission in your 2006 GMC Envoy XL, you know how frustrating it can be. One minute your SUV is driving fine, the next it’s banging into gear, refusing to shift, or throwing a check engine light that sends you into a diagnostic spiral. As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by a failing Transmission Control Module (TCM). This isn’t just an inconvenience; it affects your vehicle’s drivability, fuel economy, and safety. That’s why we offer this direct-fit, VIN-programmed T42 TCM, designed to be the definitive, no-hassle solution to get your Envoy XL running smoothly again.
A Technician’s Notebook: The Misleading Solenoid Code
I remember a 2007 Sierra that came into the shop with classic symptoms: harsh 1-2 shift and a P0752 (Shift Solenoid A Stuck On) code. The owner had already spent a few hundred dollars replacing the solenoid pack himself, but the problem persisted. He was convinced the transmission was shot. After hooking up my scan tool and monitoring live data, I saw the command signals from the TCM were erratic. The solenoid was doing what it was told, but the TCM was giving bad orders. We installed a VIN-programmed T42 module, cleared the codes, and the truck shifted like it just rolled off the factory floor. It’s a classic case where the root cause is the brain (TCM), not the muscle (solenoids).
Is Your Envoy Exhibiting These Telltale Signs?
A failing TCM will almost always give you warnings. If you’re experiencing any of the following, there’s a strong chance your module is the culprit. This 2006 Envoy XL TCM is designed to correct these exact issues.
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle gets stuck in “limp mode,” often refusing to shift out of 2nd or 3rd gear.
- ✔ Your check engine light or transmission warning light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ A complete failure to upshift or downshift, leading to poor acceleration and terrible fuel mileage.
- ✔ Intermittent loss of communication with the module, causing unpredictable behavior.
A Straightforward Guide to Your TCM Replacement
One of the best parts about this solution is its simplicity. For the DIY enthusiast or the professional mechanic, the installation is a breeze and requires no specialized programming tools. In most cases, you’ll be done in under 30 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s electronic systems.
- Locate the Module: On your 2006 Envoy XL, the TCM is typically found in the left-hand (driver’s side) of the engine compartment. Check near the strut tower or air cleaner box.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new module into place and securely plug in the connectors. You’ll hear a click when they are properly seated.
- Final Steps: Reconnect the battery terminal. While the system may reset, it’s best practice to use a standard OBD2 scan tool to clear any stored fault codes. Start the vehicle and enjoy the restored performance!
Why Choose Our VIN-Programmed Module?
This isn’t just another part. This is a complete solution. When you order, we flash the module with your vehicle’s specific VIN, loading the latest GM software updates. This ensures perfect communication between the TCM, the engine computer, and the transmission itself. You get optimal shift points, correct torque converter lockup, and reliable performance without paying for expensive dealership programming. This is the quality fix your 2006 Envoy XL TCM replacement demands, backed by a one-year warranty for total peace of mind.
Verified Vehicle Compatibility List
This T42 TCM, part number 24240449, is a direct replacement for a wide range of General Motors vehicles. Please verify your model and the location notes below.
ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COBALT 06-10 Transmission; (LH strut tower)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
ENVOY 06-09 Transmission; (LH engine compartment)
EXPRESS/SAVANA VANS 1500/2500/3500 06-14 Transmission; (RH engine compartment)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HHR 06-11 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
MONTANA 06-09 Transmission; (LH strut tower)
RAINIER 06-07 Transmission
SAAB 9-7X 06-09 Transmission; (LH engine compartment)
SIERRA/SILVERADO 1500/2500 07-13 Transmission; (next to battery)
SSR 05-06 Transmission; (front LH frame)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07-09 Transmission; (next to battery)
TRAILBLAZER 06-09 Transmission; (LH engine compartment)
UPLANDER 06-09 Transmission; (LH strut tower)
VUE 07-10 Transmission; (LH front engine compartment)
YUKON / YUKON XL 1500 07-09 Transmission; (next to battery)
Frequently Asked Questions
What exactly is VIN programming and why do I need it?
VIN programming involves loading your vehicle’s unique 17-digit Vehicle Identification Number into the module. This ensures the TCM has the correct software and calibration files for your specific engine, transmission, and options. It eliminates compatibility errors and allows for true plug-and-play installation without a trip to the dealer.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, you should scan for more specific P-codes (like P0752, P0741, etc.) to confirm the exact problem. This part is designed to fix those specific internal TCM faults.
Is there a core charge for my old part?
No, there is no core charge required for this module. You can keep your old part or dispose of it responsibly without the hassle of shipping it back to us.
Can I install this myself if I have basic mechanical skills?
Absolutely. The replacement process is very straightforward and typically involves only basic hand tools to unbolt the module and disconnect the wiring. Since our modules are pre-programmed, the most complex part of the job (the software setup) is already done for you.
What kind of warranty is included?
This transmission control module comes with a comprehensive one-year warranty, covering any defects in materials or workmanship. We stand behind the quality and reliability of our electronic components.