There is a web site calll www.streetrodguys.com that has rear a/c block kits for just about any vehicle including the trailblazer. They also have a/c line repair kits that can be used to bypass a bad section of the line. here is the link for the trailblazer
They are very inexpensive and very easy to install. I have installed many of them. I have on occasion seen some other ones but I have always had to send them back because they leak or the fitting was incorrect, I have never had a problem with any from that web site. Highly reccomend them!
Tuesday, April 19th, 2011 AT 12:49 AM