Steering Rack And Pinion problems of the 2012 GMC Acadia

I have 2 ongoing issues, 1st is the car will be driving fine then get a check engine light and have a code for cylinder misfire. Car was at dealer multiple times with issue and could not duplicate while under extended warranty. Mysteriously the intake has to come apart and be reworked since the warranty expired, and still has same issues. The 2nd and more concerning issue is the power steering. Initially took in and told the rack and pinion needs changed. Still had same issue and told power steering now needs to be changed, so we did. Sound and still stiff after 2 racks and 2 pumps. Mechanic refused to work it again. Took to dealer yesterday. Says needs new power steering pump. So dealer took for a test drive and said it's still doing it and needs another rack and pinion. At what point is GMC that has a known safety issue with steering going to fix this issue. I can't keep throwing money at this thing and I can't feel unsafe in it. What can I do?.

Was driving straight and attempted to make a right hand turn and could not turn the car. Almost got in an accident. Third time this has happened. No previous accidents, 90,000 miles. Repairs included: new stering pump, new hoses and new rack and pinion gear.

Loss of steering assist at low rpm. Result: hard to turn on either direction. When parking, reving up the engine helps steering assist return to "normal". Problem is at it worst after driving for 20 minutes or more. Near death experience: I was coming of the freeway and attempting to make a turn (at slower speed) when the steering wheel "felt locked and I nearly ended up driving over an busy overpass. It was only due to luck, very hard braking and hard manual steering that I was able to get the car to turn a little and stop before driving over overpass. Steering fluid level is normal. I am very converned as somoene could get hurt when I lose the ability to steer the vehicle (no warning lights and engine running as normal). I can't allow my wife to drive this death trap. Dealer recommended new stering pump new hoses and new rack and pinion gear. Car has only 96,000 never been in accidents. Over $4,000 in reppairs!.

The vehicle has less than 55,000 miles and recently while getting off the highway, in cold conditions, it became very difficult to turn the steering and then after about 500 feet of driving there was a grinding noise. After having the vehicle towed, it was determined that both the power steering cooling pump, the power steering pump and the actual rack and pinion steering all needed to be replaced as a significant cost as they were seized up and would have posed a serious driving risk if they had seized while driving. There are noted TSB on these items as well.

Vehicles 75,000 miles on it. While driving through a parking garage, my power steering went out, very suddenly, making driving very difficult and very dangerous. After bringing my vehicle to a mechanic, I was told I needed to replace both the steering pump and rack and pinion. After some reading, it appears as though this is a recurring issue for the Acadia that hasn't been addressed for this model year. .

Difficulty in turning, along with a grinding noise when turning right. Vehicle mileage was 73,113. Taken to GMC dealer in brighton, mi on Nov. 14, 2014 and power steering pump and rack and pinion were replaced for $2,100. 00. The car was then driven approx. 650 miles. The next morning, when backing out of drive, the steering was locked-up and the vehicle went off the driveway. Tow truck was required to take the vehicle to GMC dealer in inver grove heights, mn where the same exact parts were replaced again! I have all receipts.