Restore Flawless Shifting to Your 2006 GMC Envoy XL
If your 2006 GMC Envoy XL is suffering from harsh shifts, getting stuck in gear, or throwing transmission-related check engine lights, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline an otherwise perfectly good vehicle. This isn’t just an annoyance; it’s a critical failure that compromises drivability and safety. This T42 series TCM, part number 24252114, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Case Study: The Sierra That Wouldn’t Shift
A 2008 Sierra 1500 came into my bay stuck in what the owner called “permanent third gear”—a classic limp mode symptom. The dash was lit up with a check engine light, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. Instead of jumping to a costly transmission rebuild, we checked the basics. The fluid was fine, and the wiring was intact. The problem was electronic. We swapped in a VIN-programmed T42 module, just like this one. After a 20-minute install and clearing the codes, the truck shifted as smoothly as the day it left the factory. This single component saved the owner thousands and got their work truck back on the road immediately.
Is Your Envoy Exhibiting These Telltale Symptoms?
A failing 2006 Envoy XL TCM doesn’t always mean total failure. It often starts with intermittent issues that progressively worsen. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Unpredictable or jarring gear shifts, especially when accelerating or decelerating.
- ✔ The transmission refuses to shift out of a single gear (limp mode).
- ✔ A lit Check Engine Light or Transmission Warning Light with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable drop in fuel economy due to inefficient gear management.
- ✔ The feeling of the transmission slipping between gears.
A Straightforward Guide to Your 30-Minute Installation
One of the best features of this module is that it’s designed for a hassle-free installation that any confident DIYer or professional mechanic can perform quickly. No special programming tools are required.
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On your 2006 Envoy XL, the TCM is typically found in the left-hand (driver’s side) of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, VIN-programmed module in place and securely fasten it. Reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the system may reset, it’s best practice to use a basic OBD-II scan tool to clear any stored diagnostic trouble codes. Start the vehicle and take it for a test drive to confirm smooth shifting.
Why Choose Our Pre-Programmed TCM?
This isn’t just a replacement part; it’s a comprehensive fix. By ordering a VIN-programmed 2006 Envoy XL TCM from us, you bypass the expensive and time-consuming trip to a dealership for programming. We flash the module with the latest GM software updates specific to your Envoy, ensuring it communicates flawlessly with your vehicle’s engine computer and other systems right out of the box. Built to meet or exceed OEM specifications, this module is backed by a one-year warranty for your peace of mind.
Guaranteed Vehicle Compatibility
This T42 TCM (interchangeable with part numbers 24234503, 24230461, 24252114, etc.) is the correct fit for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E and 4L65E. While this page is focused on the 2006 Envoy XL TCM, it also fits:
GMC: Envoy (06-09), Sierra (07-13), Yukon (07-09), Savana (06-14), Canyon (08-12)
Chevrolet: Silverado (07-13), Tahoe (07-09), Suburban (07-08), Avalanche (07-08), Express (06-14), Impala (06-11), Monte Carlo (06-07), HHR (06-11), Cobalt (06-10), Colorado (08-12), SSR (05-06), Trailblazer (06-09)
Buick: LaCrosse (06-09), Lucerne (06-11), Allure (06-09), Rainier (06-07), Rendezvous (06-07)
Cadillac: DTS (06-11)
Pontiac: G6 (06-10), G5 (07-10), Grand Prix (06-08), Pursuit (06)
Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
Hummer: H3 (08-10)
Saab: 9-7X (06-09)
Do I need to take this part to the dealer to be programmed?
Do I need to take this part to the dealer to be programmed?
No. This Transmission Control Module comes fully pre-programmed to your vehicle’s VIN. It’s ready for installation right out of the box, saving you time and money on dealership programming fees.
Is this a difficult part to install myself?
Not at all. For a DIYer with basic tools, this is a straightforward job that typically takes less than 30 minutes. The module is easily accessible in the engine bay of the 2006 Envoy XL.
What is a “core charge” and does this part have one?
A core charge is a deposit you pay until you return your old part. We make it simple: this part has absolutely no core charge. You can keep your old module without any hassle.
Will this fix a P0700 check engine light code?
Yes, in many cases. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the failure, replacing it with this programmed unit will resolve the code and the underlying issue.