Is Your Silverado Running Rough, Stalling, or Showing a Check Engine Light?
If you’re dealing with frustrating engine problems like poor fuel economy, erratic shifting, or a persistent no-start condition, a failing Engine Control Module (ECM) is often the culprit. As the brain of your truck’s engine, the ECM controls everything from fuel injection and ignition timing to transmission operation. When it fails, it can cause a wide range of issues that are impossible to ignore. This isn’t just an inconvenience; it’s a critical failure that compromises your truck’s reliability and performance.
The Direct Solution: A VIN-Programmed Engine Computer
Get your truck back to factory-spec performance with this Engine Control Module, specifically for your 2016-2018 Silverado 1500 and other compatible GM vehicles. We take the guesswork and dealer hassle out of the equation. Before we ship your part, our technicians will program it with the latest GM-certified software using the Vehicle Identification Number (VIN) you provide. This ensures that the module communicates perfectly with your truck’s specific systems and options, right out of the box.
From My 20+ Years in the Bay: “A customer’s 2017 Sierra came in last week with intermittent stalling and a whole host of random communication codes that made no sense together. We checked the wiring harnesses and groundsโall solid. After hours of diagnostics, we found the 5-volt reference signal from the ECM was fluctuating. Swapping in a VIN-programmed module like this one solved everything instantly. It’s a common failure point on these trucks, where internal circuit board issues cause unpredictable problems that can mimic a dozen other bad parts.”
Simple Installation Guide for your 2016-2018 Silverado 1500 ECM
Replacing the ECM is a straightforward job you can do in your own driveway. On most Silverado and Sierra models, it’s located in the front left (driver’s side) of the engine compartment.
- Safety First: Disconnect the negative terminal from your truck’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: Find the module on the driver’s side of the engine bay, typically mounted to a bracket near the firewall or inner fender.
- Disconnect Connectors: Carefully release the locking tabs on the main wiring harness connectors and pull them straight out. Avoid wiggling them side-to-side to prevent pin damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed ECM into place and securely reconnect the wiring harnesses. You should feel a distinct click as they lock.
- Reconnect Battery: Re-attach the negative battery terminal.
Expert Pro Tip: Connector Inspection is Key
Before plugging in your new ECM, take a flashlight and closely inspect the vehicle’s harness connectors. Look for any signs of green or white corrosion, moisture, or bent pins. I’ve seen brand new modules get damaged immediately because of a corroded connector. Use a quality electronics cleaner and a small brush to clean any residue to ensure a perfect connection.
CRITICAL NOTICE: Post-Installation Relearn Procedures
This ECM is programmed to your VIN, but for security reasons, it must be synchronized with your truck’s anti-theft system after installation. This is a standard GM security feature.
- โ Vehicle Anti-Theft Relearn (VATS): If your truck does not start after installation, a security relearn is required. This procedure must be performed using a professional scan tool with access to the GM programming system (such as Tis2web or Techline Connect).
- โ Other Relearns: Depending on your vehicle’s configuration, other procedures like a Crankshaft Position Variation Relearn or injector flow rate programming may also be necessary.
- โ Buyer Responsibility: Performing these relearn procedures is the responsibility of the installer. We guarantee the module is correctly programmed to your VIN; you or your mechanic must complete the vehicle-side synchronization.
Guaranteed Compatibility & Part Number Information
This module is a direct replacement for several original equipment part numbers. If your old module has one of the following numbers, this part is a confirmed fit:
- 12692068
- 12704476
- 12686382
- 12674052
- 12674472
- 12678815
This ECM fits a wide range of GM vehicles, including:
- 2016-2018 Silverado 1500 & Sierra 1500
- 2017 Cadillac Escalade / Escalade ESV
- 2017 Cadillac XTS (3.6L Twin Turbo)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo)
- 2017 Cadillac ATS (3.6L)
- 2017 Chevrolet Tahoe & Suburban 1500
- 2017 GMC Yukon & Yukon XL 1500
- 2017 Chevrolet Corvette