GMC - B SERIES - 1979 RSS 1979 GMC B SERIES FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP 1979 GMC B SERIES STRUCTURE 1979 GMC B SERIES SUSPENSION:MULTIPLE AXLE 1979 GMC B SERIES SERVICE BRAKES, AIR:DRUM 1979 GMC B SERIES VISIBILITY:WINDSHIELD 1979 GMC B SERIES SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE