Was just wondering if any way to tell if the air ride system has been changed?

 

Changed as in converted to coil springs or upgraded to new air springs? If you are wondering about a coil conversion that would be easy to spot. Can you raise or lower the truck using the switch on the dash? If so you have air suspension. If not,get under the truck and find the axles. Now look on either end and sitting on top you should see either black air bladders or coil springs.