I I R snomos RPO DEFINITIONS V V I V4F COACHBUILDER OPTION V4P TRAILER PROVISIONS NOT TO EXCEED 7000 LBS V V4U EQUIPMENT COACHBUILDER NOT T0 EXCEED 7200 LBS A a YO4 8 50 DIAMETER RING GEAR SAGINAW REAR AXLE I Y06 9 50 DIAMETER RING GEAR SAGINAW REAR AXLE T y r t 1992 GENERAL MOTORS SERVICE PARTS OPERATIONS CAD LLAC 621 7 000 GROUP 7 8 1 1 92