2003 GMC Envoy Q&A
2003 GMC Envoy Question: Rear Suspension
It is not uncommon for the rear air suspension air pump to fail on your GMC Envoy. That being said, the system should be completely diagnosed buy a qualified technician before any parts are replaced. Most of the parts for the air suspension system are quite expensive. Proper diagnoses of this system is critical to avoid replacing parts that do not correct the problem. - Russ
truck is sitting low in the rear used to hear compressor when ever we loaded the truck with any thing,there is another compressor on the truck used for blowing up tires and other things,is this the same compressor that charges the suspension. - Visitor
On vehicles equipped with rear air springs, the air compressor may fail causing the rear suspension to sit low.
air compressor for rear air springs fail, causing rear suspensions to sit very low
rear suspension airbags....bottom out when trk is sitting for a while(over night)...when started the next day...