No I did not. But I was more than 20,000 miles past the expected life of the OE. And I was getting ready for a long trip in the Traverse. So I blinked and replaced it, LOL.
Other than the timing chain and routine maintenance, the only Traverse repair items were a new alternator, new shocks and struts, 2 batteries, new a/c compressor. Also had a/c system freon leak. Had a deer hit me with minor body damage. That's right, he hit me --- I didn't hit him.
I also have endured the stabiltrak problem that seems common in 2009-2010-2011-2012 Traverses. They finally fixed it for the next generation but too late for me. But I have learned to minimize it so it is not too bad.
I have noticed that your have Trailblazers and seem OK with them, but I gotta tell you, my previous vehicle was a 2002 Trail. It was very frustrating...constant mechanical problems. I pushed it up to just under 200,000 but I was literally carrying it across the finish line. However, it was first generation and I have heard they got better later. So I thought long and hard about getting the Traverse after the Trail experience. But I have been super pleased. I love that Traverse. It is almost like a brother to me, refuses to quit!