Hello,
I have the barnyard doors as well...you realize they provide more clearance right? Are you sure you want to get rid of them? The only problem I see with these doors is visibility otherwise it isnt so bad. I had times where I thought I wanted to change them. If you contact a GMC dealer usually they will tell you no they do not do that..but it is still possible to go to an auto shop and get this done...mind you...it may be very pricey...actually may is not the word
. It is very costly...if you aren't willing to dish out the k's of dollars to do it ... i'd just settle with the barn doors.
Jon