I have had a 2007 Yukon Denali for the past 3 months. Since purchase i had noticed that upon entry when the key fob opens the door, I have to turn down the lumbar system. Well last night I tried this and heard some popping noises. I have read past posts about replacing the lumbar sysyem and I purchased the part from the dealer. I have the back cover of the seat off the vehicle, I have disconnected the electrical connections and having trouble getting the system out. Especially the top where it looks like some hooks. If anyone has any pointers it would greatly be appreciated.