v 1981 BRAKE SYSTEM USAGE CHART 1 Y 5 1981 1 P TRUCK GASOLINE ENGINE 32 MODEL 1 V CLE SPECIFICATION BRAKE SYSTEM SPEUFICATIONS Z OPT HVY BASE BRAKES DUTY BRAKES 1 WHEEL REAR BRAKE MERCHAND BRAKE MERCHAND BASE WHEELS RPO RPO RPO RPO P30832 125 0 10500 DUAL UBB STD 1 30832 125 0 11000 DUAL JBB STD P30B32 125 0 11800 DUAL JBB STD P30B32 125 0 12300 DUAL J B8 STD P30B32 125 0 12500 DUAL JB8 STD P31132 137 0 10500 DUAL JB8 STD P31132 137 0 11000 DUAL JE8 STD i F31132 137 0 11800 DUAL JB8 STD I F31132 137 0 12300 DUAL JB8 STD P31132 137 0 12500 DUAL JB8 STD L P31432 158 5 V 10500 DUAL JB8 STD P31432 158 5 11000 DUAL JBB STD P31432 158 5 11800 DUAL JBB STD P31432 158 5 12300 DUAL JBB STD P31432 158 5 12500 DUAL JB8 STD P31 32 158 5 14500 DUAL JB8 HF7 or HFB IEEE lm DUAL JFS sw 11 ENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52A REV 2 87 BRAKE SYSTEM 17 4 000 GROUP