I think I have finally gotten my problem solved regarding the stubborn slide. After so many temporary fixes by reputable facilities I made an appointment with HWH Service in Moscow Iowa. Two hours later the corroded power cable was found, and repaired. The air only leveling system was checked out and passed inspection after replacement of the solenoid for the 12V pump. All this for $270 . Previous to this I've spent over $1200 to fix the stubborn slide at 3 different facilities. Between fuel and turnpike tolls and campground fees it cost over $500 just to get there but it was worth it. This slide has been a pain for a year and a half.