Same as the front (6.5 inch) although the speaker basket does not have the tweeters in it for the rears. www.trailvoy.com All the answers for your Trailblazer!
what is the original tire size for a 2004 trailblazer
size of bolt on break calliber on Chevy trailblazer
6 on 5
what size speakers are in the 2004 Chevy Avalanche
245/70/16 www.trailvoy.com Trailblazer enthusiasts forum!