Are you tired of the unpredictable, harsh shifting from your GMC Envoy XL? A faulty transmission control module can turn a reliable family SUV into a source of daily stress, leaving you worried about getting stuck in limp mode or causing further damage. Get back on the road with confidence with our direct-fit, VIN Programmed T42 Transmission Control Module. This is the definitive solution to restore your vehicle’s smooth, factory-fresh performance without a costly trip to the dealership.
Common Symptoms & Your Solution
If your vehicle is exhibiting any of the following signs, a failing TCM is the most likely culprit. This pre-programmed module is engineered to resolve these exact issues:
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes
- Failure to upshift or downshift, leading to poor fuel economy
- Complete loss of communication with the transmission
Our VIN Programmed T42 Transmission Control Module directly replaces faulty original units, correcting these communication errors and restoring precise hydraulic control for dependable operation.
Features & Benefits
- ✔ Plug-and-Play Installation: Your module arrives pre-programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership tools or programming, saving you time and money.
- ✔ Restore Smooth Performance: By managing shift points, torque converter lockup, and line pressure with precision, this module eliminates harsh shifting and restores the comfortable ride you expect from your vehicle.
- ✔ Built to OEM Standards: Engineered for reliability, this module meets or exceeds original equipment specifications, ensuring long-lasting durability for daily driving or demanding tasks.
- ✔ Clear stubborn DTCs: This is the correct fix for persistent transmission codes that won’t clear, ensuring your vehicle can pass inspection and operate safely.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
- ✔ No Core Charge: Keep your old part without the hassle or extra cost of returning a core.
Expert Technician’s Insight: As a diagnostician with over 20 years of experience, I’ve seen countless GM owners chase transmission problems by replacing solenoids or even the entire transmission, only to find the root cause was the TCM all along. For vehicles with the 4L60E, 4L65E, or 4L70E, the T42 module is a known failure point. A pre-programmed unit like this is the smartest repair. It’s a complete, ready-to-install solution that eliminates the guesswork and the high labor costs of dealership programming. You’re not just buying a part; you’re buying the right fix, the first time.
Installation is straightforward for the confident DIYer, typically taking less than 30 minutes. The module is located in the engine compartment (on the LH side for the Envoy XL). Simply disconnect the battery, swap the modules, reconnect, and use a basic scan tool to clear any stored codes. This VIN Programmed T42 Transmission Control Module is the most reliable and cost-effective way to get your truck or SUV back in top condition.
Frequently Asked Questions
Do I need to program this module after I receive it?
No. This module is fully pre-programmed to your vehicle’s VIN before it ships. It is a true plug-and-play solution that requires no additional dealership programming or special tools.
Is this the correct part for my 4L60E transmission?
Yes, this T42 TCM is the correct controller for GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E within the specified model years.
What tools are required for installation?
Installation typically requires only basic hand tools, such as a socket set, to access and unbolt the module. We also recommend disconnecting the battery before you begin and having a basic OBD2 scan tool on hand to clear any codes after installation is complete.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault code, indicating that the TCM has detected a problem. In many cases, a failing TCM is the source of this code. Replacing it with our programmed unit is a very common and effective solution for this and related transmission codes.
Is there a core charge for my old part?
No, there is no core charge. You can keep, recycle, or dispose of your old module without the need to send it back to us.