When your GMC Savana 3500 is your livelihood, you can’t afford the downtime caused by a failing transmission. A faulty Transmission Control Module (TCM) can bring your work to a grinding halt, causing unpredictable shifting, poor fuel economy, and even leaving you stranded. This VIN-programmed GM T42 Transmission Control Module is the definitive solution to get your workhorse back on the road quickly and reliably, without the extra time and expense of a dealership visit.
Common Symptoms & Your Solution
If your Savana van is exhibiting any of the following signs, a failing TCM is the likely culprit. This module is engineered to resolve these exact issues, restoring the dependable performance you rely on:
- Harsh or Erratic Shifting: Abrupt, jerky gear changes or a feeling of the transmission slipping between gears.
- Delayed Engagement: A noticeable pause after shifting from Park into Drive or Reverse.
- Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (often 2nd or 3rd) to prevent further damage.
- Warning Lights: An illuminated Check Engine Light or transmission warning light on your dashboard, often with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related codes.
- No Shifting: Complete failure to upshift or downshift as you accelerate or decelerate.
Installing this pre-programmed GMC Savana 3500 T42 Transmission Control Module directly addresses the electronic source of these problems, ensuring your transmission receives the correct signals for smooth, efficient operation.
Features & Benefits
- ✔ 100% Plug-and-Play Installation: This module arrives pre-programmed to your Savana’s specific Vehicle Identification Number (VIN). This critical step eliminates the need for expensive dealership programming, saving you time and money.
- ✔ Restored Drivability: By precisely managing shift points, torque converter lockup, and line pressure, this TCM restores the smooth, predictable performance your van had from the factory.
- ✔ Get Back to Work Faster: The straightforward installation, typically taking less than 30 minutes, means minimal downtime for your business.
- ✔ Built for Durability: Constructed to meet or exceed strict OEM standards, this module is designed to withstand the demanding conditions of a commercial work van.
- ✔ No Core Charge: Keep your old part without the hassle or expense of a core return, simplifying the repair process.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
In modern GM vehicles like your Savana, the TCM doesn’t just control the transmission—it communicates constantly with the Engine Control Module (ECM) and other vehicle systems. A generic, non-programmed module can cause communication conflicts, leading to persistent error codes and poor performance. Our VIN-programming process loads your van’s specific factory software and the latest GM updates onto the module before it ships. This ensures seamless integration, optimal shift strategy, and long-term reliability right out of the box.
Don’t let a faulty TCM dictate your work schedule. By choosing our expertly programmed GMC Savana 3500 T42 Transmission Control Module, you’re not just buying a part; you’re investing in reliability and peace of mind. This module is the smart, efficient fix to keep your business moving forward. With compatibility across a wide range of GM trucks and vans, including the Sierra, Express, and Yukon, you can be confident you’re getting the right part for the job. Order your GMC Savana 3500 T42 Transmission Control Module today and get back to work with confidence.
Frequently Asked Questions
Will I need to have this module programmed by a dealership?
No. This is the primary benefit of our service. The module is shipped to you fully pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you a costly and time-consuming trip to the dealer or a specialized shop.
Is this T42 TCM difficult to install on my Savana van?
Installation is straightforward for someone with basic mechanical skills. On most Savana vans, the TCM is located in the engine compartment on the right-hand side. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job typically takes under 30 minutes.
How do I know for sure that my TCM is the problem?
Common symptoms include harsh shifting, getting stuck in one gear (limp mode), and specific transmission-related diagnostic trouble codes (like P0700). While other issues can cause similar symptoms, if you’re experiencing a combination of these electronic-based problems, the TCM is the most likely culprit.
What happens if I continue driving with a failing TCM?
Continuing to drive with a faulty TCM can lead to more severe mechanical damage to your transmission. Erratic shifting and incorrect line pressure can cause excessive wear on clutches and other internal components, potentially leading to a complete transmission failure that is far more expensive to repair.
Does this part fit other GM vehicles besides the Savana 3500?
Yes, this T42 TCM is compatible with a wide array of 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions, including the Chevrolet Silverado, Tahoe, Express, GMC Sierra, Yukon, and many others. Please verify the fitment list to ensure it is correct for your specific model.