Engine Oil Leaking problems of the 2010 GMC Terrain

I was driving down the road when my 2010 GMC Terrain suddenly lost power and slowed down. The next morning my check engine light was on and stayed on. I took it to the dealership and they stated that I needed a new engine. Problems with the timing chain being stretched, camshaft and camshaft actuator, and oil leaking in the engine. How could I need a new engine, my car has 58,500 miles on it. Gm had a recall due to the timing chain stretching. I had the recall taken care of in Nov 2013. 1 1/2 years later, 15,000 miles later and 2 1/2 months past my warranty and the engine goes. Wasn't the recall suppose to take care of this issue. The dealership stated that the engine would cost around $6,000. They supposedly called gm and gm stated they would cover roughly 60%. I still have to pay $2500 to have it repaired. Plus the engine is a rebuilt engine so I can run into the same issues. I was livid. I contacted gm and they wouldn't even help me. They stated they could only work with the dealership. I have to leave it to some dealership to negotiate on my behalf. I know I am getting taken to the cleaners on this but what can I do. I have to fix it in order to trade it in. Gm knows there is a problem with the engines in the 2010 Terrain and they don't want to do a thing about it. I noticed a lot of other people were complaining of engine problem on their 2010 Terrain too. What makes the situation worse is on 5/17/2015 my husbands check engine light went on in his 2012 GMC sierra.