Is Your GM Vehicle Suffering from Engine Problems?
There’s nothing more frustrating than a vehicle that won’t run rightโor won’t run at all. If your 2018-2019 GM vehicle is experiencing baffling issues like a no-start condition, erratic engine performance, poor fuel economy, or a dashboard lit up with warning lights, the culprit is often the Engine Control Module (ECM). As the brain of your vehicle’s engine, when the ECM fails, it can cause a cascade of problems that are difficult to diagnose. From the high-performance Corvette to the workhorse Silverado, a faulty ECM can bring your vehicle to a standstill.
The Smart Solution: A VIN-Programmed ECM
Forget the hassle and high cost of a dealership visit for programming. This is a direct-fit Engine Control Module, service number 12704475, which replaces a range of original part numbers including 12680656, 12692069, 12686383, and 12688528. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures it has the latest, most stable software updates from General Motors, tailored specifically for your car or truck.
Real-World Diagnostics: A Technician’s Experience
“A customer’s 2018 Silverado 1500 was towed in last month with a persistent no-start condition and a flurry of communication error codes. The owner had already replaced the battery and checked fuses. In my shop, I’ve seen this exact scenario dozens of times. On these trucks, the ECM is mounted on the driver’s side of the engine compartment, making it vulnerable to moisture. After confirming power and ground were good at the connector, we identified internal ECM failure. A VIN-programmed module like this one was the key. After a straightforward installation and a quick security relearn with our scan tool, the truck fired right up and ran perfectly. It’s a common failure point that a pre-programmed part solves efficiently.”
Why Choose Our 2018-2019 Corvette ECM?
This module is the definitive solution for a wide range of GM vehicles, not just the Corvette. By providing us with your VIN, you receive a component that is ready for the final steps of installation, saving you critical time and money.
- โ VIN-Programmed for You: We flash the module with the correct GM calibration for your exact vehicle.
- โ Latest Software: Restores performance with the newest factory software updates.
- โ Broad Compatibility: A single solution for many popular 2018-2019 GM cars, trucks, and SUVs.
- โ Solves Common Issues: Corrects problems like false sensor codes, harsh shifting, and engine misfires caused by a bad ECM.
Installation and Post-Install Procedures (Important!)
While we handle the complex software flashing, a few final steps are required once the ECM is installed in your vehicle. This is standard procedure for modern vehicle security systems.
- Safety First: Always disconnect the negative battery terminal before beginning any work on your vehicle’s electronic systems.
- Module Installation: Carefully remove the old ECM and install the new one. Ensure all connectors are clean, free of corrosion, and securely seated.
- Security Relearn: This is a critical step. If the vehicle does not start after installation, a Vehicle Theft Deterrent (VTD) relearn must be performed. This procedure syncs the new ECM with your vehicle’s anti-theft system. This requires a professional scan tool with access to GM’s TIS2Web or Techline Connect system.
- Additional Relearns: Depending on your vehicle, other procedures like a Crankshaft Position Variation Relearn or injector flow rate programming may be necessary to achieve optimal performance. These are the responsibility of the installer.
Guaranteed Fitment for Your Vehicle
This ECM is the correct replacement for a wide array of GM models. Please verify your vehicle is on this list. Upon purchase, you must provide your VIN to ensure correct programming.
- Cadillac: 2018 Escalade, Escalade ESV; 2018 XTS (3.6L LF3)
- Chevrolet: 2018-2019 Corvette (LT1 & LT4); 2018 Silverado 1500; 2018 Suburban 1500; 2018 Tahoe; 2018 Express 2500/3500 (4.3L)
- GMC: 2018 Sierra 1500; 2018 Sierra Denali 1500; 2018 Yukon & Yukon XL 1500; 2018 Savana 2500/3500 (4.3L)