I've been running Airlift bags on my 03 for 10 years. I T'd the lines and ran the line up into my center console with a ball valve so I can dump the pressure from the cab. I use an auxiliary battery with a compressor to fill the system after I put the truck under load with my fifth wheel. Nice thing with the compressors is you can adjust while you drive, bad thing has been the cost to buy plus the install. I've done fine without it, but have always thought it would be a nice addition.