[Rockhaven]

I have the exact opposite problem with my 03 Envoys air suspension. The auxilary port works fine but the air bags won't pump up. There are three different codes that can be present to determine the problem. When you start your vehicle look at the auxillary switch in the back. it has a light on it, it will flash one-long pause-one. this means it is code one. It will do the same for two, two quick flashes-long pause etc. as well as three. Code three is for the right rear sensor and code two is for the left rear sensor. If either one fails it will automatically default to the next sensor, which means the load levelling will still work. Code one means that the eeprom needs to be reprogrammed. Hope this may help. Still trying to figure mine out. No codes on mine.