Will not raise truck, it is level but will go no higher
It is possible the rear level ride compressor isnt pumping any air. You may hear it which means so far the power ground are good, unplug one of the rear air shocks see if any air comes out. Then idle the truck see if any air comes out of the line while it is off. you may need to unplug both rear so not to cause any problems if one inflates with air the other does not. Sometimes the compressors get to a point where they are working but the valves inside the motor will not produce any air pressure whatsoever. They are easy to replace. Comes as a complete assembly
