· Premium Member
Installing a new battery shouldn't have caused the rear air leveling suspension to lose air. You can always spray a soap+water solution where the air hoses connect to the air compressor and air leveling shocks just to rule out any leaks. If that all check outs, then the compressor and height leveling sensor would be next. If not a dealership, find a reputable shop that utilizes a full range scan tool. It'll be able to read and scan for any DTCs related to the rear air leveling suspension.