Restore Flawless Shifting to Your GM Vehicle
Is your GMC Envoy’s transmission acting erratically? Harsh shifts, delayed gear engagement, and a persistent check engine light can turn any drive into a stressful ordeal. Restore your vehicle’s smooth, predictable performance with our VIN-programmed T42 Transmission Control Module (TCM). This is the definitive solution for drivers experiencing frustrating transmission problems, designed to get you back on the road with confidence and reliability.
Common Symptoms & Your Solution
A failing TCM can manifest in many ways, making your vehicle feel unreliable and unsafe. If you’re noticing any of the following, it’s a clear sign your module needs attention:
- Harsh or Erratic Shifting: Abrupt, jerky gear changes or a feeling of the transmission slipping.
- Limp Mode Activation: The vehicle gets stuck in a single gear (usually 2nd or 3rd) with drastically reduced power.
- Warning Lights: A steady Check Engine Light or a specific transmission warning illuminated on your dash.
- Diagnostic Trouble Codes (DTCs): Common codes like P0700 (Transmission Control System Malfunction) or specific solenoid codes (P0751, P0756, etc.) point directly to a control issue.
This pre-programmed T42 TCM is engineered to be the direct solution to these problems. By replacing your old, faulty unit with this expertly prepared 2006-2009 Envoy transmission control module, you’re not just fixing a part—you’re restoring the entire system’s logic and performance to factory specifications.
Features & Benefits
- âś” Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This critical step eliminates the need for expensive dealership programming, saving you time and money. Simply install the part, and you’re ready to go.
- âś” Restored Performance & Efficiency: By precisely managing shift points, torque converter lockup, and line pressure, this TCM ensures your transmission operates at peak efficiency. The result is smoother acceleration, improved fuel economy, and a more enjoyable driving experience.
- âś” OEM-Standard Quality: Manufactured to meet or exceed original equipment standards, this module provides the durability and reliability you need for daily driving, hauling, or long-distance travel.
- âś” This unit is backed by our one-year replacement warranty. We stand behind the quality of our components, giving you peace of mind with your purchase.
- âś” Broad Compatibility: A direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24242391, and more, making it the right fit for dozens of Chevrolet, GMC, Buick, Cadillac, and Saturn models.
Expert Insight: Why VIN Programming Matters
Many sellers offer generic, unprogrammed modules, leaving the most critical step to you. Our VIN programming process does more than just ensure compatibility; it loads the latest GM-authorized software and calibrations specific to your vehicle. This often corrects underlying factory issues that weren’t known when your vehicle was first built. By installing a module with the most current software, you’re getting a component that performs better and more reliably than the original ever did, preventing common failure points and ensuring long-term transmission health. This is the professional-grade solution for a lasting repair.
Frequently Asked Questions
What does a Transmission Control Module do?
The Transmission Control Module (TCM) is the electronic brain of your automatic transmission. It uses data from various sensors on the engine and transmission to control exactly when and how the transmission shifts gears, ensuring smooth operation, optimal performance, and fuel efficiency.
Is this part difficult to install?
For someone with moderate mechanical skill, the installation is straightforward. The TCM is typically located in the engine bay and is accessible with basic hand tools. The entire process often takes less than 30 minutes. Since our 2006-2009 Envoy transmission control module is pre-programmed, the most complex part of the job is already done for you.
Will this TCM fix my specific error codes?
This module is the direct solution for a host of transmission-related DTCs, including the general P0700 code and many specific solenoid and shifting error codes. If your diagnostics point to a faulty control module, this part is designed to clear those codes and resolve the root cause.
Do I need a dealership to program this module?
Absolutely not. The primary benefit of our service is that we program the module to your vehicle’s VIN before we ship it. This means it is ready for installation right out of the box, saving you the time, cost, and hassle of a dealership visit.
What vehicles is this T42 TCM compatible with?
While this listing is focused on the 2006-2009 Envoy transmission control module, this part fits a very wide range of GM vehicles from 2006-2014 equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes trucks like the Silverado and Sierra, SUVs like the Tahoe and Yukon, and cars like the Impala and G6. Please check the fitment list to confirm for your specific model.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep your old module without the hassle of returning it, making the replacement process even simpler.