On vehicles equipped with rear air springs, the air compressor may fail causing the rear suspension to sit low.Google+
Car Problem Reports
Chevrolet Trailblazer SS Air Compressor for Rear Air Springs May Fail
Chevrolet Trailblazer SS Problem
Average Mileage: 68,620 mi (40,000 mi - 80,545 mi)
air bags deflate overnight from time to time. Pump up right away and stay inflated. Annoying problem on a great truck!
Visitor, 2006 Chevrolet Trailblazer SS
Rear air bags leak down over night while truck is parked.
Visitor, 2007 Chevrolet Trailblazer SS, 75,000 mi
Lower down by its self. When not running
Visitor, 2006 Chevrolet Trailblazer SS, 72,000 mi
blown fuse , not
Air bag leak couble time a week and only pump bags up when not in motion