STANDARD PARTS HEAVY DUTY TRUCK 1982 83 BULB CHART BULB FUNCTION NO PART NO 82 83 EXTERNAL LAMPS Back Up A G B 1156 9417866 X X Clearance and Identification A G 194 9421330 X X Directional Front A G 1156 9417866 X X Directional Stop Tail A G 1157 9428902 X X Directional Frt Rr Stop Tail B 1157 9428902 X X Headlights A G B Single 178mm 7 6014 5962548 X X Headlights G B Dual Type 2 146mm 5 V4 4000 5964600 X X Headlights G B Dual Type 1 146mm 5 5001 5965416 X X Parking A G 194 9421330 X X Parking B 1157 9428902 X X Sidemarker A G 194 9421330 X Sidemarker B 1157 9428902 X X INTERIOR LAMPS Air Press Vacuum Gage B 53 131282 X X Courtesy G 1004 455136 X X Dome A 1141 142456 X X Dome G 561 9433040 X X Dome B 90 142453 X X Fiber Optic Ribbon B 168 9425542 X X Hi Beam Direction Indicator G 57 127934 X X Hi Beam Directional A 1895 9417863 X X Hi Beam Indicator B 1445 274004 X X Instrument Warning Telltale A 1895 9417863 X X Instrument Telltale G 194 9421330 X X Instrument Cluster B 1895 9417863 X X Panel B 194 9421330 X X Push n Type B 194 9421330 X X Speedometer B 1895 9417863 X X Trans Oil Temp Gage B 1895 9417863 X X Letters following function identify the following models A Astro G General B Brigadier WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION 89 L 331