Would like to hear from EXT owners about your experience regarding problems to look for. Specifically automatic rear suspension, transmission and general reliability. I had a 2002 avalanche 5.3 that was just okay I remember it was kind of squirrelly in a strong cross wind I think because of the sail and it leaked under the rear cover so I kind of expect the same thing in an EXT but I can live with those things. I tow a ski centurion boat that's just under 5k so the 6.0 should handle that easily with tow haul mode. The car I'm considering has 125k miles. Does the 2004 have a backup camera? Thanks in advance.