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 firsthand how a failing Engine Control Module (ECM) can turn a reliable vehicle into a source of constant frustration. Symptoms can be maddeningly intermittent or persistent, often including poor fuel economy, engine misfires, shifting problems, or a complete no-start condition. You’re not just buying a part; you’re buying a solution to get your vehicle running correctly again. This is the central command center for your engine, and when it fails, nothing else works as it should.
The Smart Solution: A VIN-Programmed ECM
Forget the hassle and high cost of a dealership visit. We offer a direct, reliable replacement ECM, part number 12692068, that arrives at your door pre-programmed for your specific vehicle. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and our experts will flash the module with the latest, most stable software updates directly from GM. This ensures that the computer is perfectly matched to your vehicle’s factory specifications and options.
Real-World Diagnostic Story
“A customer’s 2017 Silverado came in last week with a persistent P0300 random misfire code. The owner had already replaced all the spark plugs and ignition coils, but the problem remained. After hooking up the scan tool and watching the live data, I noticed the fuel trim adjustments were erratic on bank 1. Instead of chasing sensors, I checked the driver circuits within the original ECM. Sure enough, the injector driver for cylinder 3 was failing intermittently. We installed one of our VIN-programmed modules, performed the crankshaft variation relearn, and the truck ran perfectly. It’s a classic case where the root cause was the computer, not the parts it controls.”
Key Benefits of This 2017 CTS Engine Module
- โ VIN-Specific Programming: We load the latest GM calibrations for your exact vehicle, ensuring optimal performance and compatibility.
- โ Restores Engine Performance: Solves common issues like stalling, rough idle, hesitation, and poor acceleration caused by a faulty ECM.
- โ Clears Fault Codes: A direct fix for a wide range of diagnostic trouble codes (DTCs) related to engine management.
- โ Broad Compatibility: Replaces multiple OEM part numbers, including 12704476, 12686382, 12674052, 12674472, and 12678815.
Installation & Important Post-Install Procedures
While this is a straightforward component to replace, completing the job correctly is critical. Please read these steps carefully.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On most listed vehicles, the ECM is found in the engine compartment (often on the driver’s side) or, on the Corvette, under the passenger-side cowl.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Use a small flathead screwdriver to release the locking tabs if necessary. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place and securely reconnect all wiring harnesses. Ensure they click into place. Reconnect the battery terminal.
CRITICAL NOTICE: Post-Installation Relearn Procedures
This is the most important part of the installation. Because the ECM is tied to your vehicle’s security system, a Vehicle Theft Deterrent System Relearn is often required. If the vehicle cranks but does not start after installation, this procedure MUST be performed by a qualified technician using a GM-specific programming tool (like Tis2web or Techline Connect). Additional procedures, such as a Crankshaft Position Variation Relearn or injector flow rate programming, may also be necessary depending on your vehicle’s specific needs. This is the responsibility of the buyer/installer. We guarantee the module is programmed correctly to your VIN; you are responsible for any necessary on-vehicle initializations.
Guaranteed Fitment For These Vehicles:
This module is a confirmed fit for the following models and configurations. Please verify your part number or contact us with your VIN if you are unsure.
- 2017 Cadillac ATS (3.6L, VIN Y, opt LF4)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo, VIN 8, opt LF3)
- 2017 Cadillac Escalade & Escalade ESV
- 2017 Cadillac XTS (3.6L, VIN 8, opt LF3)
- 2017 Chevrolet Corvette (RH cowl under dash)
- 2016-2018 Chevrolet Silverado 1500 Pickup (Check ID for 16/18 models)
- 2017 Chevrolet Suburban 1500
- 2017 Chevrolet Tahoe
- 2016-2018 GMC Sierra 1500 & Sierra Denali 1500 (Check ID for 16/18 models)
- 2017 GMC Yukon & Yukon XL 1500