Get Your Van Back to Peak Performance
Is your work van or daily driver suffering from frustrating and costly engine issues? A faulty Engine Control Module (ECM) can cause a cascade of problems, from a persistent check engine light and poor fuel economy to a vehicle that won’t start at all. This isn’t just an inconvenience; it’s downtime that costs you time and money. This direct-fit 2016 Express 3500 Engine Control Module 12670335 is the definitive solution, arriving at your door pre-programmed to your vehicle’s specific VIN, ensuring a seamless installation and restoring the reliability you depend on.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing ECM is the likely culprit:
- Illuminated Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) such as P0601, P0606, or U0100
- Unexplained drop in fuel mileage
- Engine stalling, stumbling, or rough idling
- Failure to pass emissions testing
- Intermittent or total no-start conditions
Don’t let a bad computer keep your vehicle sidelined. This module is the reliable, professional-grade fix that addresses these issues at their core, getting you back on the road with confidence.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash this module with the latest GM software using your VIN before it ships. This eliminates the need for an expensive trip to the dealership for programming.
- ✔ True Plug-and-Play Installation: Once programmed, this module is ready to be installed right out of the box, simplifying the repair process for both DIYers and professional technicians.
- ✔ Restores Original Performance: By correcting engine management functions, this ECM helps restore lost power, smooth out your idle, and improve fuel efficiency.
- ✔ Broad GM Compatibility: While this is a perfect fit for your van, this module also replaces a wide range of part numbers (including 12668866, 12643636, and 12692200) for vehicles like the Silverado, Sierra, Cruze, Sonic, and more.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
An Expert’s Take
As a technician with over two decades of experience, I’ve seen countless hours and dollars wasted on chasing symptoms when the root cause was a faulty ECM. The brain of your engine needs to be perfect. A generic, un-programmed module from a big box store is a gamble that rarely pays off. Our process of programming this 2016 Express 3500 Engine Control Module 12670335 specifically to your VIN isn’t just a convenience—it’s the correct way to do the job, ensuring all vehicle systems communicate and perform exactly as the manufacturer intended.
Frequently Asked Questions
What information do you need from me after I order?
After you complete your purchase, we will need your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module with the correct software for your specific vehicle configuration.
Is this module difficult to install?
For most models, the installation is straightforward. The module is typically located in the engine bay and is secured with a few bolts and electrical connectors. Because we pre-program it, you can avoid the complex and costly programming steps required at a dealership.
Will this fix my specific problem?
This 2016 Express 3500 Engine Control Module 12670335 is designed to correct all issues directly caused by a failing computer. While it is the solution for many common drivability problems and check engine lights, we always recommend a proper diagnosis to confirm the ECM is the point of failure before ordering.
Does this part fit vehicles other than the Express 3500?
Yes, absolutely. This ECM is a compatible replacement for a wide range of GM vehicles, including various years of the Cruze, Sonic, Trax, Silverado, Sierra, and Savana. Providing your VIN ensures we load the correct software for your exact make and model.
Will I need to do anything else after installation?
In most cases, no additional steps are required. However, some GM vehicles may require a simple security or anti-theft relearn procedure, which can typically be done without special tools. We can provide instructions for this if needed.