Not airbags, those are Air Springs, like these on mine. The OEM bumper is removed, and these bolt into the existing holes in the frame where the bumpers use to be.
You didn't see any airlines running to these when you were under it? 
On edit: those don't look like timbrens either.
__________________  2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN, Ride-Rite Air...  2006 Chev 6.0L/4L80e 3500WT DRW Ex-Cab, 9 'Flat/GN, Ride-Rite Air Springs, A/T Revos. Use-ta Haves  2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab "Did you ever think that making a speech on economics is a lot like pissing down your leg? It seems hot to you, but it never does to anyone else. " -Lyndon B.Johnson  100th
Last edited by Hook'em_Horns! : 08-29-2008 at 03:17 PM.
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