y does the clutch keep acting up on my 2006 trailblazer ls ? this is the second time i have to take it in for the same thing

Im not positive of the nature of this problem, however, I would like to suggest that you call the GM Reginal Manager and complain about this continual problem. You can get the phone number by getting on line and going to the GM web page. If you will get someone of this caliber envolved I think your problem will be solved very quickly at no additional cost to you. Another avenue is to contact your local news paper and complain about not getting this problem fixed properly. Its amazing to me what happens when the TV stations show up at the dealerships and starts asking why your truck hasn't been fixed properly.. Good luck. jerry