Is Your Truck Experiencing Mysterious Engine Problems?
If your Sierra, Silverado, or other compatible GM vehicle is suddenly stalling, running rough, refusing to start, or flashing a check engine light that won’t go away, a failing Engine Control Module (ECM) is a very likely culprit. As the brain of your engine, the ECM controls everything from fuel mixture and ignition timing to transmission shifting. When it fails, the symptoms can be frustrating and difficult to diagnose. You’re not just buying a part; you’re buying a solution to get your vehicle running reliably again.
From the Shop Floor: A Real-World Diagnosis
“Just last month, a 2018 Sierra 2500 with the 6.0L V8 was towed to my shop. The owner said it would crank but not start, and sometimes it would die while driving. His local mechanic had already replaced the fuel pump and crank sensor with no luck. When I connected my scan tool, I had intermittent communication with the ECMโa classic red flag. After confirming the power and ground circuits to the module were solid, it was clear the ECM itself had an internal fault. We installed one of these pre-programmed modules, and the truck fired right up and has been running perfectly ever since. It saved the customer hundreds in wasted diagnostic time and unnecessary parts.”
The Direct, Reliable Solution for Your Vehicle
This isn’t just a replacement part; it’s a fully prepared, plug-and-play solution. We take a genuine GM ECM and program it with the latest official software updates specifically for your vehicle’s Vehicle Identification Number (VIN). This ensures perfect compatibility and optimal performance, eliminating the need for an expensive trip to the dealership for programming.
- โ VIN-Programmed for Your Vehicle: We load the latest GM software using your VIN, ensuring it’s a perfect match.
- โ Fixes Common ECM Failure Symptoms: Solves issues like no-start conditions, poor fuel economy, erratic engine behavior, and persistent diagnostic trouble codes (DTCs).
- โ No Dealer Visit Needed: This module arrives ready for installation, saving you time and money on programming fees.
- โ Direct-Fit Replacement: Guaranteed to fit and function correctly, matching part numbers 12668986 and 12692201.
Easy Installation for Your 2017-2019 Sierra 2500 ECM
Replacing the ECM is a straightforward job you can do with basic hand tools. Follow these steps to get your truck back on the road quickly.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10 minutes to allow all systems to discharge.
- Locate the ECM: On most Sierra and Silverado 2500 models, the ECM is located in the front of the engine compartment on the driver’s side, near the battery or air filter housing.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module.
- Expert Pro Tip: Before connecting your new module, take a moment to inspect the harness connectors for any signs of corrosion, moisture, or bent pins. A poor connection is a common cause of repeat ECM failure. Clean them with a dedicated electronics cleaner if any contamination is present.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New ECM: Bolt your new, pre-programmed ECM into place, reconnect the electrical harnesses until they click securely, and then reconnect the negative battery terminal.
- Final Steps: Your vehicle is ready to start. In some cases, a security or crank position sensor relearn procedure may be required, which can be done with many high-end scan tools or by a local mechanic.
Guaranteed Compatibility
This Engine Control Module is a direct replacement for the following vehicles and options. Please verify your vehicle is on this list before ordering.
- 2017-2018 Chevrolet Silverado 2500 Pickup: with 6.0L engine
- 2017-2018 GMC Sierra 2500 Pickup: with 6.0L engine
- 2017-2018 Chevrolet Sonic: All options
- 2017-2018 Buick Encore: with 1.4L engine (VIN B, 8th digit, opt LUV)
- 2017 Chevrolet Suburban 3500: All options
After purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN, and we’ll handle the programming before shipment.