So last night, it came a monsoon when we were on our way home from a baseball game. When we got home, I had to run to the store and as I was turning into the store parking lot, (sharp turn) it was like the back tires on the tahoe were chattering. Almost like it was in 4wd low driving on gravel. For the record, the tahoe isn't 4wd. I finally got it in the parking lot after doing like a 10 point turn and when I put it in reverse, it did the same thing. It felt like the tires were chattering. I backed up, pulled out into the road, and it seemed to smooth back out. I pulled into my driveway and it acted normal. I drove it around the block and it acted fine. It felt like I hit a pothole when I pulled into the store parking lot, but there was no pothole. Any ideas?