The PCV system of the Ecotec 2.4L is widely known. The best way to mitigate the problem is to 1. Run a pressure test with a manometer per the manufacturer TSB instructions and clean out the orifice if necessary. 2. Clean out the valve cover PCV hose port of all sludge and carbon. 3. Insulate the thin flimsy PCV hose with foam to prevent freezing. 4. Change oil every 5k miles and add an engine flush like Seafoam prior to oil changes. 5. Install an insulated catch can between the valve cover and the intake cover. The catch can and hoses must be insulated in northern climates to protect against wind chills which could potentially freeze the PCV line and blow out your engine main seals. It's amazing how much sludge and water vapor you capture each month in a catch can. This sludge is bad for you intake valves and contributes to carbon buildup.

Was driving our Equinox and came to a stop light. Noticed a slight shudder and very brief stutter in the engine. As I started to give it gas to go at the green light, the car lost power. It dropped in speed and power to almost a total stall. I quickly gave it a slight pump to the gas and it came back to normal. No check engine light came on. The next day as soon as I started the car, the Check Engine light turned on. I called the local Chevy dealer and was told that they couldn't see us for a week due to how booked they were.

When we got the car in to the mechanic at the dealership, we were told that after their inspection the Manifold was very badly blocked with carbon as were all of the valves and hoses for that. Non of this is covered under any of our warranty. The mechanic stated that even IF we decided to replace all that needed to be fixed, more than likely this is going to just happen again and again.