I have a 2004 Trailblazer LS with the automatic transmission and the IL 6 engine. I was traveling at around 60mph on the highway and there was a small 'click' sound and the rpms went up, and the transmission seemed to go into neutral. I coasted to a stop in a parking lot, and was able to shift into park, which held. The transmission would not shift into any gear, although the shifter would move with no problem. Haven't checked the linkage yet (running around 94 degrees on a hot parking lot) but am interested in any common occurrences that others might have been through and the solutions they found. Thanks!