Is Your GM Vehicle Running Rough, Stalling, or Showing a Check Engine Light?
As a technician with over two decades of experience under the hood, I’ve seen countless vehicles sidelined by a faulty Engine Control Module (ECM). The ECM is the brain of your engine, and when it starts to fail, the symptoms can be frustrating and widespread. If you’re dealing with unexplained performance issues, poor fuel economy, or a persistent check engine light that points to a processor failure, you’ve come to the right place for a reliable solution.
The Direct-Fit Solution: Programmed Specifically for Your Vehicle
This isn’t just a generic part off a shelf. We take a genuine GM Engine Control Module and program it specifically to your vehicle’s 17-digit Vehicle Identification Number (VIN). This critical step ensures that the module has the correct factory software and calibrations straight from GM, allowing it to communicate perfectly with your vehicle’s other systems right out of the box. Simply provide your VIN at checkout, and we handle the complex programming for you.
Common Symptoms of a Failing ECM:
- โ Persistent Check Engine Light (CEL)
- โ Engine stalling or misfiring unexpectedly
- โ Noticeable decrease in fuel efficiency
- โ The vehicle won’t start at all (no-crank or crank-no-start)
- โ Communication errors with diagnostic scan tools
- โ Problems with shifting or transmission performance
From the Shop Floor: A Real-World Diagnostic Story
“A customer’s 2017 Silverado 1500 came in last month with a no-start condition. The previous shop had already replaced the fuel pump and crankshaft sensor, but the issue remained. They were convinced the ECM was the next logical step. Before ordering a new module, I did a 10-minute check of the basics. I found a corroded ground wire on the engine block, right near the ECM harness. After cleaning the connection point and re-securing the ground, the truck fired right up. This is a classic case of misdiagnosis. While a bad ECM can cause these symptoms, always verify your main power and ground connections to the module before replacement. A little bit of due diligence can save you hundreds of dollars and a lot of frustration.”
Easy Installation & Post-Install Procedures
Replacing the 2017 ATS Engine Module is a straightforward process for a seasoned DIYer or any professional technician. However, it’s crucial to understand the final steps required to get your vehicle running.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On most listed models, the ECM is found in the engine compartment (check your specific model’s service manual for the exact location, e.g., LH front engine bay for a Sierra, RH cowl for a Corvette).
- Disconnect and Remove: Carefully unplug the electrical connectors. Note their orientation. Then, unbolt and remove the old module.
- Install the New Module: Bolt the new, pre-programmed module into place. Reconnect the electrical connectors securely, ensuring they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
IMPORTANT: Post-Installation Relearn Procedures
Because this module is integral to your vehicle’s security and powertrain systems, additional steps are often required after installation. This is the responsibility of the installer.
- Vehicle Theft Deterrent System (VTDS) Relearn: If your vehicle cranks but does not start after installation, a security relearn is necessary. This procedure pairs the new ECM to your vehicle’s anti-theft system. It MUST be performed using a professional tool with access to GM’s Tis2web or Techline Connect software.
- Other Potential Relearns: Depending on your vehicle, you may also need to perform other system initializations, such as a Crankshaft Position Variation Relearn (CASE relearn), injector flow rate programming, or idle learn procedures. These are standard for this type of repair.
This Module is a Direct Replacement for Part Numbers:
12692068, 12704476, 12686382, 12674052, 12674472, 12678815
Guaranteed Fitment for the Following Vehicles:
This 2017 ATS Engine Module and its compatible part numbers fit a wide range of GM vehicles. Please verify your part number and specific vehicle options before ordering.
- 2017 Cadillac Escalade & Escalade ESV
- 2017 Cadillac XTS (3.6L Twin Turbo, VIN 8, opt LF3)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo, VIN 8, opt LF3)
- 2017 Cadillac ATS (3.6L, VIN Y, opt LF4)
- 2017 Chevrolet Corvette
- 2017 Chevrolet Tahoe & Suburban 1500
- 2016-2018 Chevrolet Silverado 1500 (check ID)
- 2017 GMC Yukon & Yukon XL 1500
- 2016-2018 GMC Sierra 1500 & Sierra Denali 1500 (check ID)