63 PASS exc STA WAG CONV KNOB ASSY back window defogging blower switch 3820584 1 75 55 PASS DUCT right defroster 3715560 1 4 95 55 PASS DUCT left defroster 3715559 1 4 95 55 PASS DUCT center defroster two outlets 3715563 1 5 20 57 59 Ser 3 DUCT defroster air distributor use w 987759 3139648 1 55 56 PASS DUCT ASSY defroster air 3724278 1 6 20 57 PASS DUCT ASSY defroster air w mtg bracket 3735458 1 5 95 56 PASS BRACKET left detroster air duct mounting 3736643 1 15 56 PASS BRACKET right defroster air duct mounting 3736644 1 15 57 59 Ser 3 LEVER defrosting control use w 987759 3139645 1 85 63 CORVETTE LEVER detroster control 3829954 1 50 57 59 Ser 3 SPRING defroster distributor control lever use w 987759 3140540 1 55 63 PASS VALVE ASSY defroster 3156119 1 75 63 PASS OUTLET ASSY defroster 4875019 1 5 85 9 782 ELBOW ASSY COUPLING SLEEVE INLET ASSY GASKET SEAL COVER Air Duct 49 52 PASS to cowl 3690233 1 7 20 49 54 PASS COUPLING duct assy rubber 4 1 D x 2 wide 3688805 2 35 55 PASS SLEEVE right air duct rubber 1 dia 3715562 1 20 55 PASS SLEEVE left air duct rubber 1 dia 3715561 1 20 55 56 PASS 55 59 Ser 3 2nd Ser SLEEVE heater air inlet rubber 4 dia 3714902 1 15 55 56 PASS i SLEEVE tan hsg to core hsg rubber 3 dia 3715923 1 15 57 PASS SLEEVE air duct connecting 3740984 2 55 57 PASS SLEEVE fan housing 3752713 1 15 57 PASS w C A C SLEEVE tan housing to heater transition 3747338 1 4O 55 56 PASS 1NLET ASSY heater blower 3133241 1 6 20 55 59 Ser 3 2nd Ser INLET ASSY heater blower 3717258 1 8 80 58 PASS w C A C INLET ASSY evaporator outside air 3747824 1 1 05 59 60 PASS w Air Flow INLET ASSY air 3143388 1 3 70 60 63 Ser 10 thru 30 w Air Flow INLET ASSY heater air 3147139 1 5 30 61 62 PASS w Air Flow INLET ASSY heater air 3148612 1 8 75 55 56 PASS 55 59 Ser 3 2nd Ser GASKET air inlet housing 6 dia notched 3715546 1 30 57 PASS SEAL air distribution duct heat defroster 3136900 1 35 57 59 Ser 3 SEAL air inlet adapter to cowl 5 dia round 3135222 1 10 60 63 Ser 10 thru 30 SEAL plenum top panel heater air inlet 3771499 1 30 60 61 Ser 10 thru 30 SEAL air vent outlet grille 3753839 2 35 60 63 Ser 10 thru 30 w Air Flow SEAL heater to distributor duct 3771498 1 20 62 63 Ser 10 thru 30 SEAL side panel air outlet 3813748 2 35 56 60 CORVETTE COVER heater core inlet 3136473 1 8 854 57 PASS COVER rear air duct right 3734535 1 30 9 783 GRILLE Ai Duct Outlet Passenger Compartment 55 56 PASS left 7 x 91 3713413 1 1 40 55 56 PASS right 7 x 7 3713414 1 1 25 9 779 9 783 2 C 1 M n 3 General Motors Corporation