I owned a 07 avalanche for 4 years, someone rear-ended me a couple weeks ago , I recently upgraded to a 08 LTZ. I trying to find out all the info I can on the auto leveling , I guess the previous. Owner lower the back or something not working right , it's sits very much lower than my 07 did , is there a way to adjust the rear back to factory specs or do I need to replace compressor . Haven't towed anything with it ,back lower than the front ,and don't handle the Best any information on this would be very helpful..