Is Your Corvette or GM Vehicle Acting Possessed?
As a technician with over two decades in the bay, I’ve seen it all. A 2015 Corvette comes in on a flatbed, won’t start. A 2016 Silverado 1500 has a persistent check engine light and runs rough, but all the sensors check out. A Cadillac ATS has bizarre electrical gremlins that defy logic. What do these often have in common? A failing Engine Control Module (ECM), the vehicle’s central computer.
The ECM is the brain of your engine’s operations. It calculates everything from fuel injector pulse width to spark timing in milliseconds. When it starts to fail, the symptoms can be confusing and lead you down expensive diagnostic rabbit holes. Internal processor faults, cracked solder joints from thousands of heat cycles, or voltage-related damage can cripple your vehicle, leaving you stranded.
The Dealership Dilemma vs. The Right Solution
Your first thought might be the dealership, but that often means towing fees, high diagnostic charges, and a hefty bill for a new module and the labor to program it. We offer a more direct and cost-effective solution. This is a genuine GM Engine Control Module, part number 12669318, that arrives at your doorstep already programmed with the latest GM software for your specific vehicle. No extra tools, no expensive subscriptions, no trip to the dealer.
Expert Pro Tip: Check Your Grounds First!
Before you condemn your ECM, do a voltage drop test on the main power and ground circuits leading to the module. I’ve personally seen dozens of cases where a corroded ground strap on the engine block or frame caused erratic ECM behavior that mimicked a complete failure. A 15-minute check with a multimeter can save you hundreds of dollars. On the C7 Corvette, pay close attention to the grounds near the module’s location on the right-hand side cowl area.
Common Symptoms of a Failing GM ECM:
If you’re experiencing any of these issues, a faulty ECM is a very likely culprit. I’ve personally diagnosed these modules for the following faults hundreds of times:
- ✔ Check Engine Light (CEL) with communication codes (U-codes) or internal processor codes (like P0601, P0606).
- ✔ Vehicle refuses to start or cranks but won’t fire up.
- ✔ Severe performance issues, such as poor acceleration, rough idling, or stalling.
- ✔ Unexplained loss of power to other modules, causing warning lights across the dash.
- ✔ Inconsistent or non-functional fuel injectors or ignition coils.
- ✔ Transmission shifting problems or communication errors with the TCM.
The Simple, Plug-and-Play Process
We’ve made this as straightforward as possible. After you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will use certified GM equipment to flash this module with the correct, updated software for your exact build. It ships out ready for installation. In most cases, you will need to perform a security relearn procedure (often called a key relearn or anti-theft relearn), which is a simple process that can be done without any special tools and takes about 30 minutes.
Guaranteed Compatibility
This ECM, service number 12669318, is a direct replacement for a wide range of GM vehicles and supersedes several older part numbers. Please verify your original part number or match your vehicle in the list below.
Replaces Part Numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and more.
Fitment Includes (but not limited to):
- ✔ 2014-2016 Corvette: (Located on RH cowl under dash)
- ✔ 2016 Camaro: (6.2L)
- ✔ 2014-2016 Cadillac ATS / CTS / XTS: (3.6L & 6.2L options)
- ✔ 2014-2016 Silverado 1500 / Sierra 1500: (Various engine options)
- ✔ 2015-2016 Tahoe / Suburban / Yukon / Escalade: (All models)
- ✔ 2015-2016 Colorado / Canyon: (3.6L)
Don’t let a bad ECM keep your vehicle down. Order today and get the pre-programmed, reliable solution to restore your vehicle’s performance and peace of mind.