Is Your GM Truck or SUV Running Rough?
If you’re dealing with a persistent check engine light, unexplained stalling, poor fuel economy, or a no-start condition in your Cadillac, Chevy, or GMC, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine, the ECM is responsible for managing everything from fuel injection and ignition timing to transmission shifts and emissions. When it fails, the symptoms can be frustrating and difficult to diagnose. Over my 20+ years in the shop, I’ve seen countless drivers replace expensive sensors and coils, only to find the root problem was the ECM itself.
The Direct Solution: A VIN-Programmed ECM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM ECM and flash it with the very latest, most stable software calibration directly from GM, using your vehicle’s unique VIN. This critical step ensures the module is perfectly matched to your engine, transmission, and factory options, restoring original performance and reliability.
- โ VIN-Specific Programming: We load the correct GM software for your exact vehicle before shipping.
- โ Resolves Common Failures: A direct fix for issues like false sensor codes, intermittent stalling, and communication errors.
- โ Latest Software Updates: Benefit from the newest GM updates for improved performance and efficiency.
- โ No Core Charge: Keep your old part. No need to worry about returns or extra fees.
From the Shop Floor: A Real-World Diagnostic Story
“A customer’s 2017 Sierra 1500 came in last week with a random misfire on cylinder 3 that just wouldn’t go away. He had already replaced the spark plug, ignition coil, and fuel injector himself. After hooking up my diagnostic scanner, I could see the injector pulse width was erratic for that cylinder, but the injector itself tested fine. The issue was the ECM’s injector driver, which was failing intermittently. A new, properly programmed ECM like this one solved the problem instantly. It’s a classic case where chasing parts gets expensive, but diagnosing the root cause provides the real fix.”
Important Installation Information: The Final Handshake
Because this ECM is the core of your vehicle’s electronics, it’s tied directly into the security system. Upon installation, the final step is to introduce the new module to your vehicle. This is known as a Vehicle Theft Deterrent Relearn. If the vehicle does not start after installation, this procedure is required.
Please Note: This relearn procedure, along with any other necessary initializations (like a Crankshaft Variation Relearn or injector setup), must be performed by the installer using a professional GM-compatible scan tool with access to GM’s Tis2web or Techline Connect software. This is a standard final step for this type of repair and is the responsibility of the buyer or their technician.
Cross-Reference Part Numbers:
This module is a direct replacement for the following GM part numbers. Match any of these numbers on your original module to ensure compatibility:
12692068, 12704476, 12686382, 12674052, 12674472, 12678815
Guaranteed Vehicle Fitment
This 2017 Escalade ESV ECM is also confirmed to fit the following vehicles:
- Cadillac ATS 2017: (LH engine compartment), 3.6L, VIN Y (8th digit, opt LF4)
- Cadillac CTS 2017: 3.6L, VIN 8 (8th digit, opt LF3, twin turbo)
- Cadillac CTS 2017: 6.2L (supercharged)
- Cadillac Escalade / Escalade ESV 2017: (Engine compartment)
- Cadillac XTS 2017: (3.6L), VIN 8 (8th digit, opt LF3)
- Chevrolet Corvette 2017: (RH cowl under dash)
- Chevrolet Silverado 1500 Pickup 2016: (LH front engine compartment), ID 12674472
- Chevrolet Silverado 1500 Pickup 2017: (LH front engine compartment)
- Chevrolet Silverado 1500 Pickup 2018: (LH front engine compartment), ID 12686382
- Chevrolet Suburban 1500 2017: (LH front engine compartment)
- Chevrolet Tahoe 2017: (LH front engine compartment)
- GMC Sierra 1500 Pickup 2016: (LH front engine compartment), ID 12674472
- GMC Sierra 1500 Pickup / Sierra Denali 1500 2017: (LH front engine compartment)
- GMC Sierra 1500 Pickup / Sierra Denali 1500 2018: (LH front engine compartment), ID 12686382
- GMC Yukon / Yukon XL 1500 2017: (LH front engine compartment)