Is Your GM Truck or Van Suddenly Unreliable?
You rely on your vehicle every day. Whether it’s a workhorse Express van, a tough Silverado pickup, or a daily driver like a Sonic, unexpected problems can bring everything to a halt. Are you experiencing frustrating issues like a persistent Check Engine Light, engine stalling for no reason, rough idling, or a complete no-start condition? These aren’t just annoyances; they’re signs that the brain of your engine, the Electronic Control Module (ECM), may be failing.
A faulty ECM can cause a cascade of confusing problems, often leading to incorrect diagnoses and wasted money on parts you don’t need. Instead of guessing, get the definitive solution. This direct-fit ECM is the key to restoring your vehicle’s performance and your peace of mind.
From the Shop Floor: A Common ECM Misdiagnosis
“Just last month, a 2017 Silverado 2500 with the 6.0L was towed in. The owner had already replaced the fuel pump and a couple of sensors trying to chase down an intermittent stalling problem. The truck would run fine for days, then die at a stoplight. After hooking up my diagnostic scanner and monitoring live data, I noticed the 5-volt reference signal from the ECM was dropping out unpredictably. That’s a classic internal ECM failure. We installed a VIN-programmed module just like this one, and the truck has been running perfectly ever since. It saved the customer from more guesswork and costly repairs.”
The Plug-and-Play Solution: Programmed For You
Forget expensive dealership visits and complex programming tools. We handle the hard part for you. When you purchase this module, we use the Vehicle Identification Number (VIN) you provide to load the latest, most stable GM-approved software specifically for your vehicle’s configuration. It arrives at your door ready to install, making this a straightforward repair you can perform right in your driveway.
- โ VIN-Specific Programming: We flash the module with the newest GM software for your exact vehicle, ensuring perfect communication and operation.
- โ Solves Common Failures: A direct remedy for issues like Check Engine Light (CEL), no-start conditions, erratic engine behavior, and false sensor codes.
- โ No Dealer Required: This module is prepared for installation out of the box, saving you hundreds in labor and programming fees.
- โ Broad Compatibility: A reliable replacement for multiple GM cars, trucks, and vans.
Easy Installation for Your 2017-2020 Express 3500 ECM
Replacing the ECM is a manageable task for a DIYer. Follow these steps for a smooth installation. On most of these trucks and vans, the ECM is located in the front left (driver’s side) of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the ECM: Find the module in the engine bay. It will have several large electrical connectors attached to it.
- Disconnect Connectors: Carefully release the locking tabs on each electrical harness and pull them straight out from the module. Inspect the pins for any corrosion or damage.
- Remove Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Firmly plug the electrical connectors back into the new module until they click and lock. Reconnect your negative battery terminal.
- Final Step: Start the vehicle. It may run slightly rough for the first few minutes as the system completes an idle relearn procedure. Let it idle for 5-10 minutes before driving.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for original equipment part numbers 12668986 and 12692201. It is confirmed to fit the following vehicles with the specified options:
- 2017-2018 Chevrolet Silverado 2500 Pickup: 6.0L Engine
- 2017-2018 Chevrolet Sonic
- 2017-2018 Buick Encore: 1.4L Engine, VIN B (8th digit)
- 2017 Chevrolet Suburban 3500
- 2017-2018 GMC Sierra 2500 Pickup: 6.0L Engine
- 2017-2020 Chevrolet Express 3500
Restore your vehicle’s reliability and performance today. Simply provide your VIN at checkout and let us send you the solution.