I 1981 BRAKE SYSTEM USAGE CHART I 5 K TRUCK GASOLINE ENGINE VEHICLE SPECI FICATIONS BRAKE SYSTEM SPECIFICATIONS OPT HVV BASE BRAKES DUTV BRAKES Q WHEEL REAR BRAKE MERCHAND BRAKE MERCHAND J BASE WHEELS RPO RPO RPO RPO z 7 M 5 S LE M EKWW 3 M5 S LE M I K10906 129 5 6100 SINGLE JB5 J K10906 129 5 6800 SINGLE JB5 I K20903 6600 SINGLE JB6 STD JB7 J55 I K20903 S600 SINGLE JB7 J55 A Kzosos Q ssoo swan Jsv sm I K30903 131 5 9200 SINGLE JB8 STD K30903 31 5 10000 DUAL J B8 STD K3I003 135 5 9200 SINGLE JBB STD 7 K31003 135 5 9200 DUAL JB8 STD K31003 135 5 10000 DUAL JB8 STD K31403 158 5 9200 DUAL JB5 STD K31403 159 5 10000 DUAL JBE STD K30943 164 5 200 SINGLE JB8 STD K30943 164 5 10000 DUAL JB8 STD I I I ENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52A 1 REV 2 87 BRAKE SYSTEM 15 4 000 GROUP