X COOLANT GRlLLE 0IL SYSTEM 1 4 1 762 TUBE HOSE CLIP Crankcase Ventilator Outer Con t X 69 70 Ser 10 thru 30 8 cyl exc D X X D 4 WD P G T H 400 oil bath A CI 350 w 2BC 396 e I 69 70 4 WD 8 cyl exc A T H D oil X bath A Cl 350 w ZBC 69 70 Blazer 8 cyl exc A T A 4 J 71 Ser 10 Blazer w oil bath 8 4 cyl i A 71 G 20 30 8 cyl l 4 71 Ser 20 30 307 350 exc 4 H D A CI oil bath T H A A 71 72 Ser 30 D D w M H C exc 4 4 X 400 72 Ser 10 thru 30 350 3924543 1 HOSE c case vent to a cl I D X 68 70 G 10 w A T 8 cyl 68 69 G 20 Sub w A T 8 cyl 71 G 10 8 cyl exc oil bath 3905067 X1 HOSE c case vent to a cl 4 X 68 Ser 10 thru 30 396 391 1029 1 HOSE c case vent to a cl 69 D D w A l R 350 exc light I duty L P Gas A 69 D D w A I R light duty 350 A 69 D D w 2BC 350 4 69 Ser 10 thru 30 w oil bath A Cl 350 exc D D X 69 Blazer w oil bath 8 cyl 70 72 Ser 20 30 w oil bath 350 4 exc D D 1488248 1 HOSE vent to e cl 4 70 Ser 10 thru 30 396 l 70 Ser 10 thru 30 6 cyl exc D 4 D Brake Booster 1 69 70 D D 6 cyl A 69 70 Ser 10 thru 30 w gov 6 cyl i 1 I X exc Brake Booster X X 69 70 Ser 10 thru 30 w P S Air 292 exc Brake Booster X gov D D 4 69 70 Ser 10 thru 30 w Brake 4 X X Booster exc D D 69 70 Ser 10 thru 30 w light duty X A A 3 350 X 69 70 Ser 10 thru 30 w oil bath X i H D A CI 6 cyl exc Brake 4 Booster gov 71 72 All Blazer 6 cyl A 72 All 400 3951407 1 HOSE c case vent to a cl 70 Ser 10 thru 30 6 cyl exc oil bath 8 8 D D 71 72 Ser 10 Conv Cab exc 8 8 3939005 1 X HOSE c case vent zipper to a cl 71 72 Ser 10 Conv Blazer C 307 I X X exc oil bath A 4 n 71 72 Ser 20 30 307 exc 4 WD M H C 3982970 1 A HOSE vent to a cl X 72 G 10 exc 350 3972132 1 CLIP a c fuel vapor hose A 1 800 SWITCH Oil Pressure See group 9 748 for telltale windows 60 69 Ser 10 thru 30 exc FFC D D Tachometer gauges l 64 69 G 10 20 exc gauges 4 65 D D X 3815936 1 2 u 0 L 70 72 All Blazer 3815936 1 1 803 GAUGE Oil Pressure I 67 68 Ser 10 thru 30 exc D D FFC 4 X 69 72 Ser 10 thru 30 w tech gauges exc FFC D D A 4 70 72 Blazer w tach 6460746 1 4 67 72 D D 4 t I 67 72 G 10 20 30 w gauges 6460922 1 67 72 FFC 6460732 1 4 1 835 FILTER UNIT Oil see group 3 163 for flexible pipes 4 IMPORTANT By pass plug over front lower case connection must be driven in when full flow oil filter A X is used Must be flush when by pass type or no filter is used 4 4 A ul 56 67 All 8 cyl 67 69 G 10 20 8 cyl GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TL l 1 762 1 835 4 l 1 52 X 4 X X REV 5 79