Is Your GM Vehicle Running Rough, Stalling, or Showing a Check Engine Light?
If you’re dealing with frustrating engine problems like poor fuel economy, intermittent stalling, a no-start condition, or a dashboard full of warning lights, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine, the ECM controls everything from fuel injection and ignition timing to emissions systems. When it fails, the symptoms can be unpredictable and difficult to diagnose. I’ve seen hundreds of these GM vehicles in my shop, and a faulty ECM can mimic a dozen other problems, costing you time and money on unnecessary parts.
Real-World Diagnosis: A Customer Story
“A customer’s 2017 Cadillac CTS with the 3.6L twin-turbo came in last week with random misfire codes and a transmission that wouldn’t shift correctly. They had already replaced spark plugs and coils elsewhere with no luck. After a thorough diagnostic, we found that the ECM’s internal processor was failing under load, causing erratic signals to be sent throughout the vehicle. Replacing the ECM with a properly programmed unit like this one solved every single issue instantly.”
The Direct-Fit Solution: A Pre-Programmed 2017 ATS Engine Control Module
This isn’t just a replacement part; it’s a complete solution. We take a genuine OEM ECM and professionally program it to your vehicle’s specific Vehicle Identification Number (VIN). This ensures that all factory settings and the latest GM software updates are loaded before it even ships. This process eliminates the need for an expensive trip to the dealership for programming, saving you hundreds of dollars and significant downtime.
- ✔ VIN-Programmed for You: We flash the module with the newest GM calibrations specific to your vehicle. Just provide your VIN at checkout.
- ✔ Resolves Common Failures: Effectively corrects issues like false trouble codes, harsh shifting, no-start conditions, and poor engine performance.
- ✔ Broad Compatibility: This module is a direct replacement for multiple part numbers, including 12692068, 12704476, 12686382, 12674472, and 12678815.
- ✔ Restores Factory Performance: By using the latest software, this ECM ensures your engine runs as efficiently and reliably as designed.
Important: Post-Installation Procedures Required
Please read carefully: While we handle the main programming, modern GM vehicles have sophisticated anti-theft systems. Upon installation, if the vehicle does not start, you or your mechanic will need to perform a Vehicle Theft Deterrent (VTD) relearn. This procedure syncs the new ECM to your vehicle’s security system. Additionally, other specific setups like a Crankshaft Variation Relearn or injector flow rate programming may be necessary depending on your vehicle’s configuration. These are standard procedures for this type of repair and are the responsibility of the installer. Access to a professional scan tool or GM’s TIS2WEB/Techline Connect software is required for these steps.
Expert Pro Tip: Protect Your Investment
Before installing your new ECM, it’s critical to identify what caused the original unit to fail. I often find that a shorted fuel injector or a faulty ignition coil can send a voltage spike back to the ECM, damaging the driver circuit. A simple resistance check on the injectors and coils can prevent you from damaging the new module. Don’t let a $50 part take out your new computer.
Guaranteed Fitment For The Following Vehicles:
This module is verified to fit a wide range of GM cars, trucks, and SUVs. Please confirm your vehicle and options from the list below:
- Cadillac ATS (2017): Electronic Control Module; (LH engine compartment), 3.6L, VIN Y (8th digit, opt LF4)
- Cadillac CTS (2017): Electronic Control Module; 3.6L, VIN 8 (8th digit, opt LF3, twin turbo) OR 6.2L (supercharged)
- Cadillac Escalade / ESV (2017): Electronic Control Module; (engine compartment)
- Cadillac XTS (2017): Electronic Control Module; (3.6L), VIN 8 (8th digit, opt LF3)
- Chevrolet Corvette (2017): Electronic Control Module; (RH cowl under dash)
- Chevrolet Silverado 1500 (2016-2018): Electronic Control Module; (LH front engine compartment) – Check for matching ID on 2016/2018 models.
- Chevrolet Suburban 1500 (2017): Electronic Control Module; (LH front engine compartment)
- Chevrolet Tahoe (2017): Electronic Control Module; (LH front engine compartment)
- GMC Sierra 1500 / Denali 1500 (2016-2018): Electronic Control Module; (LH front engine compartment) – Check for matching ID on 2016/2018 models.
- GMC Yukon / Yukon XL 1500 (2017): Electronic Control Module; (LH front engine compartment)