[QUOTE=vint3;1592153]I am just starting as a new member. I have an issue with my 06 trailblazer and thought I might see if anybody else was experiencing the same issues.
I have a little over 100000 miles on my trailblazer and have been happy with it's performance so far, outside of some normal maintenance, upper and lower control arms, starter, water pump etc. I have recently acquired a whistling sound that starts on an acceleration from about 10 mph for a few seconds. You can actually hear it quit as it shifts. I am thinking maybe it is somehow related to the transmission. it usually doesn't start until you have driven a few miles, like it is related to something having to heat up first. It isn't real loud and it is hard to figure where it is coming from. Has anybody had anything like this before.