Restore Peak Performance to Your 2006 GMC Envoy XL
Is your GMC Envoy XL, or another GM vehicle, suffering from erratic shifting, getting stuck in gear, or displaying a persistent check engine light? These are classic symptoms of a failing Transmission Control Module (TCM), the electronic brain of your automatic transmission. A faulty TCM can disrupt communication between the engine and transmission, leading to poor performance, decreased fuel economy, and potential damage to mechanical components. This replacement T42 TCM, part number 24235732, is the definitive solution to restore the smooth, reliable operation you expect from your vehicle.
This module is not a generic, one-size-fits-all part. It comes expertly pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module has the latest GM software updates and is perfectly calibrated for your vehicle’s engine, transmission (such as the 4L60E, 4L65E, or 4L70E), and tire size. This eliminates the need for expensive trips to the dealership for programming, making it a true plug-and-play repair for both professional technicians and savvy DIYers.
From the Diagnostic Bay
We had a 2008 Silverado 1500 come into the shop that was stuck in third gear—classic limp mode. The customer was frustrated, having been quoted over a thousand dollars by the dealership for diagnostics, a new module, and programming labor. The scanner showed a P0700 code and several solenoid circuit faults. We knew the solenoids were likely fine and the issue was the TCM. We ordered this exact VIN-programmed T42 module. Installation took less than 20 minutes right next to the battery. After reconnecting the battery and clearing the codes, the truck shifted perfectly on the test drive. The customer saved hundreds of dollars and got his truck back on the road the same day.
Is Your Transmission Acting Up? Common Failure Symptoms
- âś” Harsh or Erratic Shifting: Experiencing hard clunks when shifting between gears, or unpredictable gear changes.
- âś” Delayed Engagement: A noticeable pause when shifting from park into drive or reverse.
- âś” Stuck in Limp Mode: The vehicle will not shift past 2nd or 3rd gear to prevent further damage.
- âś” Warning Lights: The Check Engine Light or a dedicated transmission warning light is illuminated on your dash.
- âś” Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (e.g., P0751, P0756).
- âś” Poor Fuel Economy: Inefficient shifting and torque converter lockup can lead to a sudden drop in MPG.
- âś” No Communication: A scan tool may be unable to communicate with the transmission control module, indicating a total failure.
The Direct-Fit Solution: Your Pre-Programmed Envoy XL Transmission Module
This module is engineered to meet or exceed original equipment specifications, ensuring a reliable and long-lasting repair. The primary benefit is the included VIN programming. By providing your VIN at checkout, you receive a module that is ready for immediate installation without any additional steps. It directly addresses common software-related glitches and ensures all transmission parameters are set correctly for your specific 2006 Envoy XL Transmission Module and other compatible vehicles. This saves you time, money, and the hassle of coordinating with a dealership or specialized programming service.
Simple Installation Process
Installation is straightforward for most models. The TCM is typically located in the engine compartment, often near the battery, on a strut tower, or under the air cleaner box. The process generally involves:
- Disconnect the Battery: Always disconnect the negative battery terminal before working on any electronic components.
- Locate the Old TCM: Refer to your vehicle’s service manual if you are unsure of the location.
- Disconnect and Remove: Carefully unplug the electrical connectors and unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new module in place and securely reconnect the electrical harnesses.
- Reconnect Battery and Clear Codes: Reconnect the battery. While this may clear some codes, it’s best to use a scan tool to ensure all transmission-related DTCs are cleared from the system’s memory.
With no core charge, you don’t have to worry about the cost and inconvenience of sending your old, faulty part back. This streamlined process gets your vehicle shifting smoothly again in no time.
Frequently Asked Questions
Why is VIN programming so important for a TCM?
VIN programming loads your vehicle’s specific software and calibrations onto the module. This includes information about the engine, transmission type, gear ratios, and tire size. Without correct programming, the transmission may shift incorrectly, set false trouble codes, or not function at all. Our pre-programming service makes this a plug-and-play part.
Will this module fix a P0700 trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the check engine light to be turned on. While a faulty TCM is a very common cause, the P0700 is often accompanied by other codes that pinpoint the specific issue. Replacing a bad TCM will resolve the P0700 and its related codes.
Is this part difficult to install myself?
For someone with basic mechanical skills and tools, the installation is typically simple and can be done in under an hour. The module is usually in an accessible location in the engine bay. The most important part is ensuring the battery is disconnected before you begin.
What GM transmissions is this T42 module compatible with?
This T42 TCM is designed for vehicles equipped with popular 4-speed automatic transmissions, including the 4L60E, 4L65E, 4L70E, and 4L80E. It fits a wide range of GM cars, trucks, and SUVs from approximately 2006 to 2014.
Do I need to send my old part back?
No. We do not require you to return your old module. There is no core charge associated with this part, which saves you the hassle and expense of a return shipment.