GM Repair Problems? Ask GM Repair Expert Now.
Hi Im David, you wont be able to clear that light. It will only go out when the problem is fixed.
Unfortunately, the only way this system can be tested to see what is going on with it is with the use of a scan tool, the same way you would check the check or service engine soon light. Because it is a class 2 electronic system, it takes a class 2 scan tool to pull up the codes that will be stored in the computer (a regular code reader won't work) that will tell us what component in the system has failed or has a problem. There are sensors mounted on the frame that let the system know when the compressors need to turn on to pump the system up and when to exhaust the air from the system to let the system down. There is also an air pressure sensor in the system that must be working ok or the system would have let the air out and the truck would be setting low by now. You might inspect the rear control arms and make sure the links that connect them to the height sensors are still connected. If one of these has come unhooked, it would affect the system. There is also a 60 amp fuse and a relay that you may want to inspect, but other than that you will pretty much need the scan tool to see what codes are stored in the computer, then you would have an idea of what sensors , switches or computer, etc, to be checking. You may even get lucky and find a bad connection someplace in the system, but without the scan tool you are pretty limited in what you can do with the system
it looks like there is the one fuse in the under hood box (60 amp) and another 15 amp in the instument panel box that is labled 4wd that is also tied into the air pump circuit
do you still need assistance?
New expert here, the most common cause for this problem is a failed air compressor assembly.