1990 BRAKE SYSTEM USAGE CHART G TRUCK VEHICLE BRAKE SPECIFICATIONS MODEL WHEEL REAR GVW BRAKE MERCHANDISING N0 BASE WHEELS RATING RPO RPO G11005 110 0 SINGLE 6000 JB5 GAS J55 G11006 110 0 SINGLE 6000 JB5 GAS J55 G11305 125 0 SINGLE 6000 JB5 GAS J55 G11306 125 0 SINGLE 6000 JB5 GAS J55 G21005 110 0 SINGLE 6600 JB5 GAS G21005 110 0 SINGLE 6850 JD5 DIESEL G21006 110 0 SINGLE 6600 JB5 GAS G21006 110 0 SINGLE 6850 JD5 DIESEL G21305 125 0 SINGLE 6600 JB5 GAS G21305 125 0 SINGLE 6850 JD5 DIESEL G21306 125 0 SINGLE 6600 JB5 GAS G21306 125 0 SINGLE 6850 JD5 DIESEL G31305 125 0 SINGLE 8600 JB7 GAS G31305 125 0 SINGLE 8600 JD7 DIESEL G31306 125 0 SINGLE 8600 JB7 GAS G31306 125 0 SINGLE 8600 JD7 DIESEL G31303 125 0 SINGLE 8600 JB7 GAS G31303 125 0 SINGLE 8600 JD7 DIESEL G31303 125 0 DUAL 10 000 JB8 GAS DIESEL G31332 125 0 SINGLE 8600 JB7 GAS G31332 125 0 SINGLE 8600 JD7 DIESEL G31332 125 0 DUAL 8900 JB8 GAS DIESEL G31603 146 0 DUAL 10 500 JB8 GAS DIESEL G31605 146 0 SINGLE 8 600 JB7 GAS G31606 146 0 SINGLE 8 600 JB7 GAS G31632 146 0 DUAL 10 500 JB8 GAS DIESEL i 31991 GENERALMOTORSSERWCEPARTSOPERAUONS 1TTRUCK 52G 4 999 4 164 1 91