Restore Flawless Shifting to Your GMC Envoy
Is your 2006-2009 GMC Envoy suffering from harsh, erratic shifting, getting stuck in gear, or flashing a check engine light? These are classic signs of a failing Transmission Control Module (TCM). Don’t let a faulty module sideline your reliable SUV. This genuine GM T42 TCM, service number 24243921, is the definitive, hassle-free solution to get you back on the road with confidence. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box—no expensive dealership programming required.
Common Symptoms & Your Solution
A failing TCM can cause a host of frustrating and potentially unsafe driving conditions. If you’re experiencing any of the following, this module is the solution you need:
- Harsh bangs or clunks when shifting gears
- Delayed engagement when shifting from Park to Drive or Reverse
- Vehicle stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift, leading to poor acceleration and fuel economy
Installing this professionally programmed TCM for 2006-2009 GMC Envoy directly addresses the root cause of these issues, restoring the crisp, smooth shifting and reliable performance you expect.
Features & Benefits
- ✔ VIN-Programmed for Your Envoy: We flash the module with the latest GM software using your vehicle’s VIN. This guarantees perfect communication between the engine and transmission for optimal performance and eliminates the need for a costly trip to the dealership.
- ✔ Plug-and-Play Installation: Because it arrives pre-programmed, installation is a simple bolt-in, plug-in process. Most DIY mechanics can complete the job in under 30 minutes.
- ✔ Restores Transmission Performance: This module precisely controls torque converter lockup, shift points, and line pressure, resulting in smoother operation, improved fuel efficiency, and a longer lifespan for your transmission.
- ✔ No Core Charge Required: Keep your old part without the hassle of core returns or extra charges, saving you time and money.
- ✔ Built to OEM Standards: Engineered to meet or exceed General Motors’ strict quality and durability specifications for dependable, long-term operation.
- ✔ Guaranteed Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
In modern vehicles like your Envoy, the TCM is the brain of the transmission. It’s not a one-size-fits-all part. It needs to know your vehicle’s specific tire size, gear ratios, and engine parameters to function correctly. A generic, non-programmed module will cause immediate shifting problems and error codes. Our VIN programming service ensures this T42 TCM is a perfect digital handshake with your vehicle’s other computers, providing a seamless and permanent fix.
By choosing our expertly prepared, programmed TCM for 2006-2009 GMC Envoy, you’re not just buying a part; you’re investing in a reliable repair that restores your vehicle’s drivability and your peace of mind. This module is also a direct replacement for a wide range of GM trucks and SUVs, including the Chevrolet Tahoe, Silverado, GMC Sierra, and Cadillac DTS, making it a versatile and trusted solution.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. The main benefit of our service is that we pre-program the module to your vehicle’s VIN before we ship it. It arrives ready for a plug-and-play installation, saving you hundreds of dollars in dealership fees.
Where is the TCM located on my 2006-2009 GMC Envoy?
On the 2006-2009 GMC Envoy, the T42 TCM is typically located in the engine compartment on the driver’s side (LH), often near the firewall or strut tower.
Is this part difficult to install myself?
For most individuals with basic mechanical skills, this is a straightforward installation. It usually involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and then installing the new one in its place. The entire process often takes less than 30 minutes.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault code, indicating that the TCM has detected a problem. While a faulty TCM is a very common cause, it’s essential to diagnose the specific codes the TCM has stored. However, if you are experiencing shifting issues along with a P0700 code, replacing the TCM is often the correct solution.
What happens if I install a module that isn’t programmed?
An unprogrammed module will not communicate correctly with your vehicle’s Engine Control Module (ECM) and other systems. This will result in immediate and severe shifting problems, a check engine light, and the vehicle may not even start or move.