Get Your Workhorse Back on the Job, Fast.
When your GMC Savana 3500’s transmission starts acting up, your entire workday is on the line. Unpredictable shifting, warning lights, or getting stuck in limp mode isn’t just an inconvenience—it’s a threat to your schedule and your business. This T42 Transmission Control Module (TCM), pre-programmed to your van’s specific VIN, is the direct, no-hassle solution to restore the reliable performance you depend on. Eliminate the guesswork and costly dealership programming with a part that’s ready to install right out of the box.
Common Symptoms & Your Solution
A failing TCM can mimic serious internal transmission problems, but the fix is often much simpler. If your Savana is experiencing any of the following, this module is the definitive solution:
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Active 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
- Noticeable decrease in fuel economy
Don’t let these issues sideline your vehicle. Our VIN programmed T42 TCM directly addresses the root cause of these electronic failures, restoring crisp shifting and clear communication between your engine and transmission.
Features & Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. No expensive trips to the dealership for flashing or setup are required.
- ✔ Restored Drivability: Eliminates harsh shifting and gear-hunting, providing smooth, factory-new performance and restoring your confidence on the road.
- ✔ Cost-Effective Repair: Save hundreds of dollars by avoiding dealership programming fees and diagnostic time. This is a straightforward fix you can often do yourself.
- ✔ OEM-Standard Quality: Engineered to meet or exceed original equipment specifications, ensuring long-lasting durability for your hard-working van.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
Expert Insight: The Programming is Everything
From the shop floor: We’ve seen countless GM work vans like the Savana and Express come in with transmission issues that mechanics misdiagnose as internal failures. More often than not, the problem is a faulty TCM. The critical step is the programming. An improperly programmed module can cause more harm than good. By programming this VIN programmed T42 TCM to your specific vehicle before it ships, we eliminate all guesswork. You’re not just getting a part; you’re getting a guaranteed electronic handshake that restores factory performance right out of the box.
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 latest GM software onto the module before we ship it. This ensures the TCM works perfectly with your Savana’s specific engine, transmission, and options, just like the original part from the factory.
Do I need to take this part to a dealer after installation?
No. The pre-programming process completely eliminates the need for any additional dealership programming or expensive scan tool procedures. It is a true plug-and-play solution.
Is this compatible with my 4L80E transmission?
Yes, this T42 TCM is compatible with a wide range of 4-speed GM automatic transmissions from this era, including the 4L60E, 4L65E, 4L70E, and the heavy-duty 4L80E commonly found in the Savana 3500.
How difficult is the installation?
For most models, including the Savana van, installation is straightforward. The TCM is typically located in the engine compartment on the right-hand side. The process involves disconnecting the battery, unplugging the old module, swapping in the new one, and reconnecting the battery. Most people with basic tools can complete it in under 30 minutes.
Will this fix my P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the main engine computer. While this module often resolves the underlying issue causing the P0700, it’s important to have the specific transmission codes read to confirm the diagnosis. This part directly fixes faults related to the TCM itself or the solenoids it controls.
Is a core charge required for my old part?
No, there is no core charge. You can keep your old part without the hassle of returning it, saving you time and money.