Get Your Work Van Back on the Road, Fast
When your Chevrolet Express 2500 is your business, transmission problems aren’t just an inconvenience—they’re a threat to your bottom line. Harsh shifting, getting stuck in gear, or a lit check engine light means downtime and lost income. This OEM-quality T42 Transmission Control Module (TCM) is the definitive solution, arriving pre-programmed to your van’s specific VIN. This eliminates the need for expensive dealership programming, allowing for a straightforward, plug-and-play installation that gets you back to work with confidence.
Common Symptoms of a Failing T42 TCM & Your Direct-Fit Solution
A failing TCM can mimic a major mechanical failure, but often, replacing this electronic module is all that’s needed. If your van is experiencing any of the following, this part is your solution:
- Erratic or Harsh Shifting: Abrupt, clunky gear changes or a delay when shifting from park to drive.
- Stuck in Limp Mode: The transmission refuses to shift, often stuck in 2nd or 3rd gear, to prevent further damage.
- Warning Lights: A persistent Check Engine Light or Transmission Warning Light on your dash.
- Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction) or specific solenoid codes like P0750-P0758.
- No Communication: A scan tool is unable to communicate with the transmission module.
This pre-programmed 2006-2014 Express 2500 transmission control module is engineered to resolve these issues directly, restoring the precise electronic control your transmission depends on for smooth, efficient operation.
Features & Benefits
- ✔ VIN Programmed for Your Van: We flash the module with your vehicle’s VIN and the latest GM software updates before it ships. This ensures 100% compatibility and means no extra costs or trips to the dealer for programming.
- ✔ Restores Proper Shift Logic: Eliminates harsh shifting, gear slipping, and limp mode, protecting your transmission’s mechanical components from unnecessary wear and tear.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for dependable performance you can count on for daily work routes and heavy loads.
- ✔ Clear Communication: Re-establishes a clean data link between the engine and transmission, resolving fault codes and ensuring all systems work in harmony.
- ✔ No Core Charge Required: A simple, straightforward purchase without the hassle and extra cost of returning your old, faulty part.
- ✔ Warranty Backed: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: A common mistake we see is installing a non-programmed TCM. It simply won’t work. The module needs to communicate with the Engine Control Module (ECM) and Body Control Module (BCM), and that requires the correct VIN-specific software. Our pre-programming service saves you that critical, often-overlooked step. You’re not just buying a part; you’re buying a complete solution that’s ready to install right out of the box.
Frequently Asked Questions
Will this module require any additional programming?
No. This 2006-2014 Express 2500 transmission control module is delivered fully programmed to your vehicle’s VIN. It is a true plug-and-play solution, ready for immediate installation without needing a scan tool or a visit to the dealership.
Is this TCM difficult to install?
Installation is straightforward for a DIYer with basic tools or any professional mechanic. On most Express and Savana vans, the TCM is located in the engine compartment on the right-hand (passenger) side. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. The entire process typically takes less than 30 minutes.
How do I know for sure that my TCM is the problem?
While the symptoms listed above are strong indicators, a proper diagnosis with a professional scan tool is the best way to be certain. Look for codes like P0700 or specific solenoid circuit faults. A module that won’t communicate with the scan tool is also a definitive sign of failure.
What happens if I don’t replace a failing TCM?
Continuing to drive with a faulty TCM can lead to poor fuel economy, unpredictable performance, and potentially severe mechanical damage to your transmission due to incorrect fluid pressure and shift commands. A timely replacement can save you from a much more expensive transmission rebuild down the road.
Does this part fit other GM vehicles besides the Express 2500?
Yes, this T42 TCM is compatible with a wide range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes models like the Silverado, Sierra, Tahoe, Yukon, and many others. Please verify the part number or use our vehicle fitment tool to ensure compatibility.