Is your 2006-2014 Chevrolet Express 3500 van suffering from erratic shifting, getting stuck in gear, or throwing transmission-related check engine lights? These are classic signs of a failing Transmission Control Module (TCM). This vital component is the brain of your automatic transmission, and when it malfunctions, it can cripple your vehicle’s performance and reliability. Restore proper function with this direct-fit, VIN-programmed T42 TCM, designed to get your workhorse van back on the road without a costly trip to the dealership.
Expert Pro Tip: Before installing your new TCM, disconnect the vehicle’s battery for at least 15 minutes. This not only ensures your safety but also helps clear any learned adaptive memory from the old, faulty unit. After installation, use a scan tool to clear any stored Diagnostic Trouble Codes (DTCs) for a clean slate.
Common Symptoms of a Failing GM T42 TCM
- ✔ Harsh, slamming, or unpredictable gear shifts.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Vehicle entering “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Stored trouble codes such as P0700, P0750, or other solenoid-specific faults.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Complete loss of shifting capability.
Solving Shifting Problems with a Programmed Express 3500 TCM
The transmission in your Express van, typically a 4L80E, relies on precise electronic commands from the TCM to function correctly. Our T42 module is the definitive solution, arriving pre-programmed to your van’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates flawlessly with your vehicle’s Engine Control Module (ECM) and other systems, using the latest factory software. This eliminates common compatibility issues and error codes that arise from using a generic, non-programmed part. By replacing your faulty Express 3500 TCM, you are directly addressing the root cause of poor transmission performance, restoring the smooth and reliable operation you depend on.
Key Features & Benefits
- ✔ VIN Programmed for Your Van: Simply provide your VIN at checkout, and the module arrives ready for plug-and-play installation. No additional programming is required.
- ✔ Restores Smooth Operation: Eliminates harsh shifting, hesitation, and slipping by ensuring accurate solenoid control and torque converter lockup.
- ✔ Built to OEM Standards: Engineered for durability and reliability, this module meets or exceeds original equipment specifications for a long service life.
- ✔ No Core Charge: Keep your old part without the hassle or expense of a core return, saving you time and money.
- ✔ Broad Compatibility: This T42 module is a direct replacement for multiple service numbers, including 24252114, 24234503, 24242391, and more.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming loads your vehicle’s specific software and calibration files onto the module before it ships. This ensures the TCM works perfectly with your van’s engine, options, and transmission type, preventing compatibility errors and the need for expensive dealer programming.
Where is the TCM located on a Chevrolet Express 3500?
On the 2006-2014 Express and Savana vans, the Transmission Control Module is typically located in the engine compartment on the right-hand (passenger) side.
Will this module fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a faulty TCM is a common cause, this code can also be triggered by other issues. However, if you are experiencing other symptoms like erratic shifting, replacing a faulty Express 3500 TCM is often the correct solution.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the installation is straightforward. It involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire process typically takes less than 30 minutes.
Does this part come with a warranty?
Yes, this Transmission Control Module is backed by our one-year warranty, giving you peace of mind with your purchase.