New to this site and have found some great info, so thanks to everybody! I have an '04 Trailblazer that I bought new and have been extremely happy with it. I did encounter one problem when I was going to tow it when I was moving. After trying for several hours, I could not get the transfer case into neutral to disengage the rear axle. I remembered that there wasa time that my mother had driven my car once for about 100 miles in 4HI and wondered if that might have something to do with it. I used the directions for shifting into Neutral as described in the owner's manual, but to no avail. I have about 90k miles on the vehicle and have never gotten the diffs serviced. Any thoughts? Ideas?