How do I test it?
Replace it?
If you are not the original owner, there is a chance that a previous owner took the cheap route and replaced the air bag shocks with a standard shock. The problem with that is many times folks don’t realize that they also need to replace the spring as the air ride spring is softer than a normal system spring.
Look under the vehicle at the rear shocks and see what you have. Here is what the air shock looks like.
If the shocks on your vehicle look like this, you can test it like this. With the vehicle running, load up the rear cargo area with some thing heavy, like a person or two. You should hear the compressor kick on and try and pump up the rear shocks. It is located behind the rear driver side wheel well. If you don’t hear it, your compressor is likely shot. If you do hear it, watch and see if the rear end lifts and levels out. If the compressor runs, you can get underneath and spray soapy water on the air lines and air bags to see if there is a leak.
My guess is that with 180K on the vehicle, both are shot. Typical failure mode is the air bag gets a leak which causes the compressor to keep running to try and air the system up and then just burns out. You can go OEM or Arnott makes good air shocks for our vehicles.
AS2708 is a reman unit that maintains the AutoRide feature for the rear.
AS2715 is a new unit that uses Arnotts a proprietary valve design with a resistor to bypass the AutoRide system so you don’t get an error.
I’ve used both over the years with good results.
For the compressor, I’ve used both Arnott and Dorman with good results.
