I'm 6 hours into an 8 hour drive and have been running the heated seat to compensate for my back hurting from the lumbar for the past 2 hours ....just made a pit stop. Mine is the 17 limited EL. I've done this same trip with my 01 Chevy Suburban LT 20 times or more without my back hurting. The last trip in the suburban was this past spring....It isn't that comfortable. I can't speak to the later models but my 01 Yukon had 4 way lumbar adjustments and the seat moved seperately from the back so you could get the lumbar in just the right way in your back for max comfort. Th is expedition only has 2 way lumbar adjustments and the seat is connected to the back so if it isn't in the right vertical position you just have to deal with it. That being said it is starting to hurt my back. I don't know if I would want this on long trips. Also this is the limited version.
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