Restore Your Transmission’s Performance and Reliability
Is your GMC Savana, Chevy Silverado, or Tahoe suffering from erratic shifting, getting stuck in gear, or throwing persistent transmission codes? A faulty Transmission Control Module (TCM) is often the culprit, leading to frustrating performance and potential damage. This OEM-quality T42 TCM is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN. This means no expensive trips to the dealership for programming—it’s a true plug-and-play fix that gets you back on the road with confidence and restored performance.
Common Symptoms & Your Direct Solution
If you’re experiencing any of the following issues, this module is designed to be the solution. It directly addresses the electronic failures that cause:
- Harsh, delayed, or unpredictable gear shifts
- The vehicle being stuck in “limp mode” (usually 2nd or 3rd gear)
- A lit Check Engine Light or Transmission Warning Light with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift correctly, leading to poor acceleration and decreased fuel economy
- Complete loss of communication with the transmission
Features & Tangible Benefits
- ✔ 100% Plug-and-Play Installation: This module is a fully VIN programmed T42 TCM. We flash it with your vehicle’s VIN and the latest GM software updates before shipping, so it works perfectly right out of the box.
- ✔ Eliminate Dealership Hassles: Because the programming is done for you, you can skip the costly and time-consuming process of having a dealership program a blank module.
- ✔ Restore Smooth Operation: By precisely controlling shift points, torque converter lockup, and line pressure, this module restores the smooth, responsive shifting you expect from your vehicle.
- ✔ Built for Durability: Constructed to meet or exceed strict OEM specifications, this module is engineered for long-lasting reliability, whether you’re hauling cargo in an Express van or towing with a Sierra.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
As a technician, I’ve seen countless vehicle owners waste time and money installing a non-programmed TCM. The module simply won’t communicate correctly with the vehicle’s other computers, like the Engine Control Module (ECM). Our process ensures this critical electronic handshake happens flawlessly. By providing a VIN programmed T42 TCM, we eliminate the guesswork and ensure all transmission strategies and calibrations are perfectly matched to your specific vehicle build, from engine size to axle ratio. This is the key to a successful, long-term repair.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the corresponding factory software onto the module before we ship it. This allows it to communicate perfectly with your vehicle’s systems upon installation, just like the original part did.
Do I need to take my vehicle to a dealer after installation?
No. Our VIN programming service makes this part a true plug-and-play solution. You will not need any further programming from a dealership or specialized mechanic, saving you significant time and money.
Where is the T42 TCM located on most of these vehicles?
Location varies by model. Common spots include the engine compartment on the driver’s or passenger’s side, next to the battery, under the air cleaner box, or on the LH strut tower. The fitment list provides specific locations for many compatible vehicles.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this VIN programmed T42 TCM often resolves the root cause that triggers a P0700, it’s essential to diagnose any other specific codes that are present (e.g., for solenoids or sensors) to ensure a complete repair.
Is a core charge required for this part?
No, there is no core charge. You can keep your old part without the hassle of returning it, making the process simpler and more convenient for you.