Buick Enclave owners have reported 2 problems related to steering is loose (under the steering category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Buick Enclave based on all problems reported for the Enclave.
As I was driving the power steering was randomly going out for just a moment so I checked my power steering fluid and it was fine. The next time I drove it when I went to make a turn the power steering completely stopped working and I almost ran into another car. Very scary with 4 children in the car! took it to 2 mechanics that I trust and they were both shocked that the steering rack was loose. Both said that it was something they almost never see, it was not something I could have done to make that happen and they were shocked to see that it was a problem. Both told me to look into a recall for it since it was a major safety issue and problem that is not a normal wear and tear. I check my VIN number and there are no recalls but I do see on multiple message boards that this is a big problem for 2009 Buick Enclaves with 80,000 miles.
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In August of 2014, around 60k miles, I noticed a moan when I steered as well as a "knock" that I had heard previously and taken into the dealership under warranty (they said it was a tire rod; clearly it was not). I was aware the moan may be my power steering pump, so I brought it in for diagnostic appointment to a local repair shop. Not only did I find my power steering pump needed replacement, but that was the cause and effect of a much large issue- my steering rack was loose, and was disengaging from the mount, which in turn, caused the corruption of my power steering pump. I was told it was worsening very quickly and if I lost my steering rack from the mount, I could lose steering, which could result in a crash. I was informed this type of repair is highly unusual for a car this new, with no accident history, and otherwise in excellent condition, and is likely an "engineering issue. " I am appalled at not only the price of these repairs which I paid out of pocket ($1,968. 51), but after some research, how common this particular problem is with 2008 & 2009 Buick Enclaves, especially around 60k miles. The mileage on my vehicle now is 65,342.