Steering Is Tight problems of the 2012 GMC Acadia

I started having steering problems when I would slow down to make a turn on a city street. The steering was very tight. Unsafe condition without warning. I had the power steering unit replaced, then I was told the rack and pinion had metal in them and needed to be replaced. Mechanic was unable to flush out the metal. I picked up the car today after a cost of $2,2oo. Drove home on city streets, same problem only tighter turning. Called the mechanic and was told to return the car. Just luck I have another car to drive. Should be a recall on this very unsafe condition.

We bought this used car from a dealer drove it about 4 to 5 months and the left signal light failed, so we changed it worked for one day and then went dead again. Turning left from my street the steering was really hard and had problems turning left but I did finally on another occasion the same thing happened. Finally driving suddenly we saw a turn engine off and the engine started making loud noises and went dead in the middle of the street. So we kept gliding with no engine running and went into a parking lot. Lucky for us the car stopped right in the parking lot. Had to be towed few miles to a mechanic that told us the timing chain is broken and in need for new engine. We towed it to another mechanic and the same thing was told. So now it is been sitting at the mechanic's shop for two week waiting for new engine to come in . I can not believe that around 84000 miles this car needs a new engine and it is not cheap at all. The car has a salvage tilte but this does not have anything to do with the problems since too many people have been documenting this problem, steering, electrical and failed engine. Why gm did not recall these cars for these failure. They are putting people and families at risk and we are stuck with the repairs and the bills piling up.