Group 81: Primary Fuel Filter, continued Item Part Description Quantity Variation Number 81BT 1 GM91972 Fuel Filter 1 2 GM91973 Fuel Pump 1 3 GM77149 Seal Kit 1 4 GM50107 Fitting, adapter 2 5 GM50115 O-ring 4 6 360165 O-ring 5 7 GM91974 Fuel Filter 1 8 GM50193 O-ring 1 9 GM91975 Filter 1 10 GM52830 Drain plug 1 11 GM50114 O-ring 4 12 GM84091 Sensor 1 13 GM30375 Flange Nut, M10 2 14 GM91976 Filter 1 15 223458 Drain Plug 1 16 GM91974 Fuel Filter 1 17 223466 O-Ring 1 18 360556 Elbow Fitting, 45 deg. 1 19 GM50292 Fitting plug 1 20 GM50230 Sensor 1 21 GM50106 Fitting, adapter 1 22 GM50280 Bleed valve 1 23 # Screw, M8 x 20 4 24 GM88692 Gasket 1 25 GM91977 Bracket 1 26 # Screw, M10 x 25 2 27 # Screw, M10 x 35 2 28 GM91978 Fuel Line 1 29 GM91979 Plate 1 30 GM24536 Screw 2