GM PRODUCTION OPTIONS RPO FY LY USE DIV MODEL DIVISIONAL RPO DESCRIPTION FY1 85 85 AXLE FRONT 2 36 RATIO FY3 88 91 TRANSAXLE FINAL DRIVE 3 79 RATIO FY5 85 88 TRANSAXLE FINAL DRIVE 3 52 RATIO W FO1 82 88 FRAME HEAVY DUTY F16 76 91 AXLE FRONT 2 53 RATIO F17 76 92 TRANSAXLE FINAL DRIVE 2 84 RATIO F25 76 87 AXLE FRONT 3 32 RATIO F40 76 91 SUSPENSION HEAVY DUTY FRONT AND REAR F41 76 87 SUSPENSION HEAVY DUTY FRONT AND REAR SPECIAL F41 88 92 SUSPENSION FIRM RIDE HANDLING FRONT AND REAR F42 76 90 SUSPENSION HEAVY DUTY FRONT F44 76 92 CHASSIS EOUIPMENT HEAVY DUTY F45 76 85 AXLE FRONT 2 93 RATIO F47 82 86 AXLE FRONT 2 73 RATIO F51 76 92 ABSORBER HEAVY DUTY SHOCK F57 82 85 AXLE FRONT 3 15 RATIO F58 76 91 BAR HEAVY DUTY FRONT STABILIZER F59 76 91 SHAFT FRONT STABILIZER F6O 76 87 SPRING HEAVY DUTY FRONT F60 88 92 SPRING HEAVY DUTY FRONT F61 82 92 SHAFT REAR STABILIZER F62 76 91 TRANSAXLE FINAL DRIVE 2 39 RATIO F65 76 83 SUSPENSION FRONT AIR F66 76 87 SUSPENSION HEAVY DUTY FRONT AIR F67 82 86 AXLE FRONT 3 19 RATIO F68 82 91 TRANSAXLE FINAL DRIVE 3 45 RATIO F71 82 84 SPRING HEAVY DUTY WITH SHOCK ABSORBER F72 82 87 SPRING HEAVY DUTY WITH SHOCK ABSORBER F72 88 89 6 D SPRING HEAVY DUTY F73 88 91 DRIVE ALL WHEEL F75 76 91 TRANSAXLE FINAL DRIVE 3 18 RATIO F77 82 90 TRANSAXLEXFINAL DRIVE 3 73 RATIO F79 82 93 TRANSAXLE FINAL DRIVE 2 97 RATIO GH0 89 90 AXLE REAR 3 54 RATIO GH2 76 88 AXLE REAR 2 29 RATIO GH3 86 89 AXLE REAR 2 77 RATIO GK9 89 91 AXLE REAR 4 63 RATIO GM1 86 91 AXLE REAR 2 59 RATIO GM3 85 91 AXLE REAR 3 45 RATIO GM7 82 83 AXLE REAR 2 39 RATIO GM8 76 91 AXLE REAR 2 56 RATIO I G01 85 91 AXLE REAR STANDARD RATIO MERCHANDISING OPTION GS4 85 86 AXLE REAR 2 70 RATIO GT4 76 92 AXLE REAR 3 73 RATIO GT5 76 92 AXLE REAR 4 10 RATIO GT7 89 91 AXLE REAR 3 33 RATIO GT8 76 89 AXLE HEAVY DUTY REAR 4 10 RATIO GU1 76 88 AXLE REAR 2 41 RATIO GU2 76 92 AXLE REAR 2 73 RATIO GU3 82 85 AXLE REAR 2 93 RATIO GU4 76 92 AXLE REAR 3 08 RATIO GU5 76 91 AXLE REAR 3 23 RATIO GU6 76 92 AXLE REAR 3 42 RATIO GV4 82 87 AXLE REAR 3 36 RATIO GV8 82 85 AXLE REAR 2 72 RATIO GW4 84 85 AXLE REAR 3 31 RATIO GW6 85 89 AXLE REAR 3 27 RATIO GW9 76 92 AXLE REART2 93 RATIO GX3 88 93 TRANSAXLE FINAL DRIVE 3 33 RATIO GX4 76 83 AXLE REAR 3 75 RATIO GX5 76 83 AXLE REAR 4 09 RATIO GY5 76 87 AXLE FRONT 3 65 RATIO G44 85 91 AXLE REAR 3 07 RATIO G5O 76 91 SPRING HEAVY DUTY REAR G51 76 90 SPRING SPECIAL HEAVY DUTY REAR G52 82 91 SPRING EXTRA CAPACITY RR 15000 LB G60 76 91 SPRING REAR AUXILIARY G66 76 87 ABSORBER AIR BOOSTER REAR SHOCK G66 88 91 LEVEL CONTROL MANUAL AIR G67 76 87 ABSORBER AUTO LEVEL CONTROL SHOCK SYSTEM G67 88 91 LEVEL CONTROL AUTO AIR G72 82 87 AXLE REAR 2 14 RATIO j T 1989 GENERAL MOTORS SERVICE PARTS OPERATIONS BU CK 44J 11 1 nr 0 1a REV 10 89