Restore Your Vehicle’s Performance and Reliability
Is your Corvette, Sierra, or Escalade suffering from baffling issues like intermittent stalling, a persistent check engine light, or a complete no-start condition? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can be the hidden culprit behind a host of frustrating problems. The ECM is the brain of your engine, and when it starts to falter, the symptoms can be unpredictable and difficult to diagnose. This isn’t just an inconvenience; it’s a critical failure that can leave you stranded.
We offer a straightforward, reliable solution: a replacement Engine Control Module, part number 12692068, delivered to your door already programmed with the latest GM factory software specific to your vehicle’s VIN. You provide us with your Vehicle Identification Number at checkout, and our experts handle the complex initial programming. This saves you a costly trip to the dealership for flashing and gets you one giant step closer to a smooth-running vehicle. This is the definitive fix for a compromised computer, ensuring your engine receives the correct signals for optimal fuel delivery, ignition timing, and emissions control.
From the Diagnostic Bay: The Phantom No-Start
A few months back, a 2017 Corvette Z06 was towed into the shop. The owner was at his wit’s end. The car would start and run perfectly for weeks, then suddenly refuse to start for a day, with no rhyme or reason. The battery was new, the starter was fine, and there were no consistent trouble codes. After checking all the primary power and ground circuits to the ECM, we noticed that during the no-start events, the fuel pump relay wasn’t getting its command signal. We hooked up a scope and found the signal driver inside the ECM was intermittently failing. A replacement 2017 Corvette Engine Module, programmed and installed, solved the problem for good. It’s a classic case of how internal ECM failure can create phantom issues that defy simple diagnosis.
Is Your Vehicle Showing These Telltale Signs?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, your engine’s computer may be the root cause. This module is the correct solution for these common symptoms and associated diagnostic trouble codes (DTCs).
- ✔ Engine stalling or misfiring for no apparent reason
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Poor fuel economy and noticeable loss of power
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Check Engine Light is on with internal processor codes like P0601, P0606, or P062F
- ✔ Communication loss codes with other modules (U0100)
Your Step-by-Step ECM Installation Roadmap
Installing your new 2017 Corvette Engine Module is a manageable job for a confident DIYer or a quick task for any professional. The key is following the correct procedure, especially the post-installation steps.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On the 2017 Corvette, the ECM is located under the dash on the right-hand (passenger) side cowl area. On most trucks and SUVs like the Sierra or Tahoe, it’s in the left-front of the engine compartment. Consult a service manual for your specific vehicle’s location.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket and remove it.
- Install the New Module: Mount your new, pre-programmed ECM in place and securely fasten it. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect Battery: Reattach the negative battery terminal.
- CRITICAL – Security Relearn: The vehicle will NOT start until a Vehicle Theft Deterrent (VTD) relearn is performed. This procedure pairs the new ECM to your vehicle’s security system. This requires a professional scan tool or access to GM’s TIS2Web/Techline Connect software. This is a mandatory step and the responsibility of the installer.
- Additional Relearns: Depending on your vehicle, other procedures like a Crankshaft Position Variation Relearn or injector flow rate programming may be necessary to ensure perfect operation and clear any remaining codes.
Verified Fitment Across the GM Lineup
This module is a direct replacement for a wide range of popular GM cars, trucks, and SUVs. Please verify your part number or match your vehicle from the list below. This computer is compatible with part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815.
- Cadillac ATS (2017): 3.6L, VIN Y (LF4)
- Cadillac CTS (2017): 6.2L Supercharged or 3.6L Twin Turbo (LF3)
- Cadillac Escalade / ESV (2017)
- Cadillac XTS (2017): 3.6L, VIN 8 (LF3)
- Chevrolet Corvette (2017)
- Chevrolet Silverado 1500 (2016-2018)
- Chevrolet Suburban 1500 (2017)
- Chevrolet Tahoe (2017)
- GMC Sierra 1500 / Denali 1500 (2016-2018)
- GMC Yukon / Yukon XL 1500 (2017)
Frequently Asked Questions
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential. We use it to load the precise, vehicle-specific software and calibrations from GM directly onto your new module before we ship it. This ensures it communicates correctly with your engine and other systems.
What is a ‘theft relearn’ and can I do it myself?
A theft relearn (or VTD relearn) is a security procedure that syncs the new ECM to your vehicle’s immobilizer system. Without it, the vehicle will not start. This procedure requires professional-grade diagnostic tools with access to GM’s software, like Techline Connect. It is typically performed by a repair shop.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the old ECM (e.g., codes P0601-P0606), then yes, this new module will resolve the issue after installation and any necessary relearn procedures are completed.
Is this part difficult to install?
The physical replacement—unbolting the old unit and plugging in the new one—is straightforward for most models. The critical part of the job is ensuring the post-installation electronic procedures, like the security relearn, are performed correctly.
What happens if I install it and my car doesn’t start?
This is the expected behavior until the Vehicle Theft Deterrent relearn is successfully completed. The vehicle’s security system is preventing startup until it recognizes the new, authorized ECM.
Do you accept returns if I don’t do the relearn procedure?
The module is guaranteed to be correctly programmed to the VIN you provide. The responsibility for performing the necessary on-vehicle relearn procedures rests with the buyer or their installer. We cannot accept returns for issues arising from the failure to complete these mandatory steps.