Restore Peak Performance to Your GM Workhorse
A work van like your GMC Savana 3500 or a truck like the Silverado isn’t just a vehicle—it’s a critical tool for your business. When transmission problems sideline it, every minute of downtime costs you money and creates headaches. This genuine GM T42 Transmission Control Module (TCM), pre-programmed to your vehicle’s specific VIN, is the definitive solution to get you back on the road quickly and reliably. Eliminate guesswork and expensive dealership visits with a part that’s ready for installation right out of the box.
Common Symptoms & Your Direct Solution
If you’re experiencing any of the following issues, a failing TCM is the likely culprit. This module is engineered to resolve these exact problems:
- Harsh, erratic, or delayed gear shifts that make driving unpredictable.
- The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear, with limited power.
- An 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, leading to poor acceleration and terrible fuel economy.
Installing this programmed T42 transmission control module is the most effective way to restore the crisp, smooth shifting and dependable operation you expect from your vehicle.
Features & Benefits
- ✔ Plug & Play VIN Programming: We program the module to your vehicle’s exact VIN before shipping. This ensures perfect communication with your vehicle’s systems and eliminates the need for a costly trip to the dealership for programming.
- ✔ Restores Shifting Logic: By precisely controlling shift points, line pressure, and torque converter lockup, this module restores the smooth, efficient performance of your 4L60E, 4L65E, 4L70E, or 4L80E transmission.
- ✔ Durable OEM-Standard Construction: Built to meet or exceed strict General Motors standards for reliability and longevity, ensuring it can handle the demands of a daily driver or a heavy-duty work vehicle.
- ✔ Solves Diagnostic Headaches: A new, correctly programmed TCM is often the final fix for persistent and confusing transmission fault codes that other repairs can’t solve.
- ✔ This unit is backed by our one-year replacement warranty.
From the Shop Floor: Why VIN-Specific Programming is Non-Negotiable
“In our 20+ years of diagnostics, we’ve seen it all. A common mistake is installing a generic, non-programmed module. On modern GM vehicles, the TCM is the ‘brain’ of the transmission and must be perfectly synced with the engine controller (ECM) and body controller (BCM). Without the correct VIN-specific software, you’ll face immediate shifting problems, incorrect gear ratios, and a flood of new error codes. Our pre-programming service isn’t just a convenience—it’s the critical step that makes this a successful, lasting repair, saving you hours of frustration and hundreds of dollars in diagnostic fees.”
Whether you’re fixing a family SUV like a Tahoe or keeping a fleet of Express vans running, this programmed T42 transmission control module delivers the reliability you depend on. With no core charge required, you can complete the job without the hassle of returning your old part.
Frequently Asked Questions
What does a T42 TCM actually do?
The Transmission Control Module (TCM) is a computer that controls all functions of your automatic transmission. It reads data from various sensors to determine the perfect time to shift gears, control fluid pressure, and engage the torque converter clutch for optimal performance and fuel efficiency.
Is this part difficult to install?
For most experienced DIYers or any professional technician, the installation is straightforward. The module is typically located in the engine compartment and can be replaced in under 30 minutes. Since our programmed T42 transmission control module is a plug-and-play part, no special computer tools are needed after installation.
Do I need to send my old part back?
No. We do not require a core return for this part. You can keep or dispose of your old module at your convenience, simplifying the repair process.
How do I know this will fit my specific vehicle?
This module fits a wide range of 2006-2014 GM vehicles listed in the compatibility chart. The most crucial step is providing your VIN during checkout. This allows us to load the correct software for your specific make, model, and year, guaranteeing a perfect match.
Will this fix my P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700, it’s essential to diagnose any other potential issues. However, if the TCM itself has failed, replacing it is the correct solution.