End Frustrating Transmission Problems and Get Your Van Back to Work
Is your 2006-2014 GMC Savana 3500 suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) can bring your work to a halt, costing you time and money. 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 restores the crisp, reliable shifting you depend on.
Common Symptoms & Your Solution
If you’re experiencing any of the issues below, a failing TCM is the likely culprit. This module is engineered to resolve these exact problems:
- Harsh, jerky, or delayed gear shifts
- Vehicle stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or transmission warning light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift properly
- Poor fuel economy and a feeling of lost power
Installing our programmed T42 transmission control module is the most efficient way to correct these issues, ensuring your vehicle’s transmission computer communicates flawlessly for optimal performance.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with your vehicle’s VIN and the latest GM software updates before it ships. This ensures perfect compatibility and eliminates the need for any additional programming.
- ✔ Restores Smooth Operation: Regain precise, factory-smooth shifting and torque converter lockup, improving drivability and fuel efficiency.
- ✔ Fixes Common DTCs: Directly addresses communication and solenoid performance codes, clearing your dashboard of persistent warning lights.
- ✔ Built for Durability: Engineered to meet or exceed original equipment standards, providing a reliable, long-term solution for your work van or truck.
- ✔ Simple, Hassle-Free Installation: Designed for a direct fit, this module can be installed in under 30 minutes with basic tools. No core charge means you can keep your old part.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
On modern GM vehicles, the TCM doesn’t just talk to the transmission—it’s in constant communication with the Engine Control Module (ECM) and Body Control Module (BCM). A generic, non-programmed module can cause communication conflicts, leading to persistent error codes or even a no-start condition. Our VIN programming service ensures this programmed T42 transmission control module is recognized by your vehicle’s network instantly, just like the original part. This critical step saves you from diagnostic headaches and ensures the repair is done right the first time.
Frequently Asked Questions
Do I need to have a dealer program this module after I install it?
No. This is the primary benefit of our service. The module arrives at your door pre-programmed to your vehicle’s specific VIN. You can install it yourself or have your mechanic do it without needing any special dealer software.
How difficult is the installation?
Installation is straightforward for anyone with basic mechanical skills. The TCM is typically located in the engine compartment (often near the battery or air cleaner box). The process involves disconnecting the battery, unplugging the electrical connectors from the old module, swapping it with the new one, and reconnecting everything. It usually takes less than 30 minutes.
How do I know for sure that my TCM is the problem?
Common signs include erratic shifting, the vehicle entering limp mode, and specific diagnostic codes like P0700 (Transmission Control System Malfunction). While these symptoms strongly point to a faulty TCM, it’s always best to have a professional diagnosis or use a quality scan tool to confirm the issue before ordering.
Will this fit vehicles other than a GMC Savana 3500?
Yes. This programmed T42 transmission control module is compatible with a wide range of 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. This includes many Chevrolet, GMC, Buick, Cadillac, Pontiac, and Saturn models. Please check the detailed fitment list on this page to confirm compatibility with your specific vehicle.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This provides coverage against defects, giving you confidence in your purchase.