DRIVERS SIDE REAR AXLE AND TIRE CAME OFF THE VEHICLE, CAUSING 2006 SILVERADO TO WRECK. AIR BAG DID NOT DEPLOY. WE WERE ON THE ENTRANCE RAMP TO I-95 WHEN SUDDENLY TRUCK TURNED TOWARD CONCRETE GUARD RAIL. AFTER HITTING RAIL HEAD ON AND SKIDDING ACROSS ENTRANCE RAMP HITTING RAIL ( SEVERAL TIMES) VEHICLE CAME TO A COMPLETE STOP. TIRE AND AXEL WERE (LEFT REAR-DRIVER SIDE) GONE. TRUCK IS TOTALED. AIR BAG DID NOT DEPLOY. *TR