Restore Smooth, Reliable Shifting to Your GMC Envoy
Is your 2006-2009 GMC Envoy suffering from harsh shifting, getting stuck in gear, or displaying a transmission warning light? These are classic signs of a failing Transmission Control Module (TCM). Don’t let a faulty module compromise your vehicle’s performance and your peace of mind. This T42 TCM, service part number 24238856, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a hassle-free, plug-and-play installation that gets you back on the road with confidence.
Common Symptoms & Your Solution
A failing TCM can cause a host of frustrating and potentially dangerous issues. If you’re experiencing any of the following, this module is designed to be the direct-fit remedy:
- Abrupt, jerky, or delayed gear shifts
- The vehicle enters “limp mode,” stuck in a single gear (often 2nd or 3rd)
- Illuminated Check Engine Light or Transmission Warning Light
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift properly, leading to poor acceleration and fuel economy
- Intermittent loss of communication with the transmission
This module directly replaces the faulty original, restoring the precise electronic control required for your transmission to function as it did from the factory. The pre-programmed 24238856 Envoy transmission control module ensures all shift points and torque converter operations are perfectly calibrated for your specific vehicle.
Features & Benefits
- ✔ Plug & Play Installation: This module is professionally programmed to your vehicle’s VIN number before shipping. This critical step eliminates the need for expensive trips to the dealership for programming, saving you time and money.
- ✔ Restored Performance: By precisely managing shift solenoids, line pressure, and torque converter lockup, this TCM restores the smooth, predictable shifting you expect from your Envoy.
- ✔ OEM-Quality Engineering: Built to meet or exceed original equipment standards, ensuring long-lasting durability and reliable operation under all driving conditions.
- ✔ Cost-Effective Solution: Get a dependable fix without the high cost and complexity of sourcing and programming a module at a dealership. This is the smart choice for both DIY mechanics and professional shops.
- ✔ Guaranteed Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
In modern vehicles like your Envoy, the TCM is the brain of the transmission. It’s not a one-size-fits-all part. Each module must be calibrated with the vehicle’s unique VIN to account for specific factory settings, tire sizes, and gear ratios. Skipping this step with an unprogrammed module is a recipe for continued shifting problems and fault codes. Our VIN programming service ensures that when you install this 24238856 Envoy transmission control module, it communicates flawlessly with your vehicle’s other computers right out of the box, providing a true and lasting solution.
Frequently Asked Questions
What does “VIN programmed” actually mean?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This makes it a true plug-and-play part, as it’s already calibrated to your Envoy’s exact factory specifications, eliminating the need for any additional programming.
Will this fix my transmission warning light?
Yes, if the warning light and associated codes (like P0700) are being caused by a faulty TCM, this part is designed to resolve the issue. After installation, it’s recommended to clear any stored codes with a standard OBD-II scan tool.
Is this part difficult to install?
For someone with basic mechanical skills, the installation is straightforward. The TCM is typically located in the engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in reverse order. Most installations take under 30 minutes.
Do I need to send my old part back?
No, there is no core charge for this item. You can keep or dispose of your old module without any hassle or additional fees.
How can I be sure my TCM is the problem?
While the symptoms listed are strong indicators, a proper diagnosis from a qualified mechanic or a scan tool that can read transmission-specific codes is the best way to confirm a TCM failure. Common indicators are communication codes or multiple solenoid circuit faults appearing at once.
Is the 24238856 Envoy transmission control module compatible with other vehicles?
Yes, this T42 TCM is compatible with a wide range of 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E and 4L65E. This includes many Chevrolet, GMC, Buick, Pontiac, Cadillac, and Saturn models. Please verify the part number or use our vehicle fitment tool to ensure compatibility.