I had an 07 GMC and put the compressor on the frame with a plate like one other comment. Drove it for about 5 years and the aircompressor failed. Cost a bundle for another compressor. Now had a 13 Chevy 2500 HD and bought a cheap ($12.00) little compressor from a local Bi-Mart. I plug it into the cigarette lighter receptacle on the dash. I used one line and a "T" so both airbags are on the same line. That way if I lose one bag, I have lost both and am not lopsided. I put a small valve in the fuel tank filler door and fill my bags from there. I found I did not use the compressor that much and decided to buy a new rod and tackle with the money I saved on the small stand alone unit. If the $12.00 compressor fails, no big deal. When the compressor Les Schwab sold me failed, it was several hundred dollars to replace. So far, no big deal to use the small, separate compressor for the bags. As I got older I have moved from more complicated, installed systems to simpler uninstalled systems.