2005 Hummer H2 steps to deflate rear air bag suspension

To be depressurized the air suspension system, you will have to install a scan tool with the key in the on position. Go to a special function menu of the air suspension section and follow the on screen directions. The suspension will deflate the air springs until the suspension is on the jounce bumpers. You can order the scan tool from this site. If you have any more questions don't hesitate to write back.