Is Your GM Truck or Car Running Rough?
A failing Engine Control Module (ECM) can be the source of countless headaches. If you’re dealing with a persistent check engine light, poor fuel economy, erratic engine performance, or even a no-start condition, the brain of your engine might be the culprit. In my 20+ years as a technician, I’ve seen how a faulty ECM can mimic a dozen other problems, leading to frustrating and expensive diagnostic dead ends. This isn’t just a part; it’s the central command for your vehicle’s performance and reliability.
The Simple, Direct-Fit Solution
Forget about costly dealership visits and the hassle of coordinating programming. We offer a straightforward solution: a genuine GM ECM, part number 12692201, delivered to your door fully programmed for your specific vehicle. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and our experts will flash the module with the latest factory software from General Motors. This ensures perfect communication between the ECM and all other systems in your vehicle, right out of the box.
Expert Pro Tip: Check Your Grounds Before Replacement
Before you swap out the ECM, take 10 minutes to inspect and clean the main engine-to-chassis ground strap. On many GM trucks, it’s a braided strap near the passenger side cylinder head. I’ve seen dozens of cases where a corroded or loose ground caused intermittent communication errors and symptoms that perfectly mimicked a bad ECM. A wire brush and a tight connection can sometimes save you the entire repair. It’s a simple check that separates professional diagnostics from parts-swapping.
Why Choose Our Pre-Programmed 2017-2019 Sierra 2500 ECM?
Getting your vehicle back to factory-spec performance is our priority. This module is the key to restoring lost power, efficiency, and drivability.
- โ VIN-Programmed for You: We load the latest GM software using your VIN, ensuring a perfect match.
- โ No Additional Programming Needed: This is a true plug-and-play solution. No need for expensive scan tools or a trip to the dealer.
- โ Resolves Common Issues: Effectively corrects problems like false diagnostic trouble codes (DTCs), harsh shifting, and engine stumbling.
- โ Direct OEM Replacement: Guaranteed to fit and function just like the original part.
- โ Broad Compatibility: A single solution for a wide range of popular GM cars and trucks.
Plug-and-Play Installation: Get Back on the Road Fast
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10 minutes for the system to discharge.
- Locate the ECM: On Sierra and Silverado trucks, the ECM is typically found in the front left (driver’s side) of the engine compartment, mounted to the fender or firewall.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New ECM: Mount your new, pre-programmed ECM and securely re-attach the electrical connectors until they click into place.
- Reconnect Battery: Re-attach the negative battery terminal. Your vehicle is now ready to start.
Guaranteed Fitment Information
This module is a direct replacement for part numbers 12692201 and 12668986. It is confirmed to fit the following vehicles with the specified options:
- 2017-2018 Chevrolet Silverado 2500 Pickup: Electronic Control Module; (LH front engine compartment), 6.0L
- 2017-2018 GMC Sierra 2500 Pickup: Electronic Control Module; (LH front engine compartment), 6.0L
- 2017 Chevrolet Suburban 3500: Electronic Control Module; (LH front engine compartment)
- 2017-2018 Chevrolet Sonic: Electronic Control Module
- 2017-2018 Buick Encore: Electronic Control Module; (1.4L), VIN B (8th digit, opt LUV)
Don’t let a faulty computer keep your vehicle sidelined. Order this pre-programmed 2017-2019 Sierra 2500 ECM today and restore the performance and reliability you depend on.