GM PRODUCTION OPTIONS A RPO FY LY DIVISIONAL RPO DESCRIPTION SPOGM RPO DESCRIPTION A FW8 84 84 AXLE FRT 1 99 RATIO W 1 99R FW8 FW9 82 88 AXLE FRT 3 43 RATIO W 3 43R FW9 FX2 84 85 AXLE FRT 2 66 RATIO W 2 66R FX2 FX3 85 B6 SUSPENSION CONTROL ELEK DRIVER SELECT FIRM W ELEK SUSP CONT FX3 FX4 85 89 AXLE FRT 3 35 RATIO W 3 35R FX4 FX8 86 89 AXLE FRT 3 61 RATIO W 3 61R FX8 FY1 85 85 AXLE FRT 2 36 RATIO W 2 36R FY1 FY5 85 88 AXLE FRT 3 52 RATIO W 3 52R FY5 FO1 82 88 FRAME HEAVY DUTY W H D FRM FO1 F16 76 88 AXLE FRT 2 53 RATIO W 2 53R F16 F17 76 89 AXLE FRT 2 84 RATIO W 2 84R F17 F25 76 87 AXLE FRT 3 32 RATIO W 3 32R F25 F29 76 81 AXLE FRT 2 41 RATIO W 2 41R F29 F36 76 81 AXLE FRT 2 19 RATIO W 2 19R F36 F40 76 89 SUSPENSION HEAVY DUTY FRT RR W H D SUSP F40 F41 76 B9 SUSPENSION SPECIAL HEAVY DUTY FRT RR W H D SUSP F41 F42 76 89 SUSPENSION HEAVY DUTY FRT W H D SUSP F42 F44 76 89 CHASSIS EOUIPMENT HEAVY DUTY W F44 F45 76 85 AXLE FRT 2 93 RATIO W 2 93R F45 F47 82 86 AXLE FRT 2 73 RATIO W 2 73R F47 F51 76 89 ABSORBER HEAVY DUTY SHOCK W H D SHK F51 F57 82 85 AXLE FRT 3 15 RATIO W 3 15R F57 F58 76 88 SHAFT HEAVY DUTY FRT STABILIZER W H D STAB F58 F59 76 88 STABILIZER FRT W F59 F60 76 89 SPRING HEAVY DUTY FRT W H D FRT SPR F60 F61 82 88 SHAFT STABILIZER RR W F61 F62 76 89 AXLE FRT 2 39 RATIO W 2 39R F62 F65 76 83 SUSPENSION FRONT AIR W AIR SUSP F65 F66 76 89 SUSPENSION HEAVY DUTY FRONT AIR W H D AIR SUSP F66 F67 82 86 AXLE FRT 3 19 RATIO W 3 19R F67 F68 B2 89 AXLE FRT 3 45 RATIO W 3 45R F68 F71 82 84 SPRING W SHOCK ABSORBER HEAVY DUTY VAR 1 W H D SUSP F71 F72 82 87 SPRING W SHOCK ABSORBER HEAVY DUTY VAR 2 W H D SUSP F72 F73 88 88 DRIVE ALL WHEEL W ALL WHL DRIVE F73 F75 76 89 AXLE FRT 3 18 RATIO W 3 18R F75 F77 82 88 AXLE FRT 3 73 RATIO W 3 73R F77 F79 82 89 AXLE FRT 2 97 RATIO W 2 97R F79 F85 76 81 SHAFT HEAVY DUTY FRT STABILIZER W H D STAB F85 F9O 76 81 AXLE FRT 2 73 RATIO W 2 73R F90 GH2 76 88 AXLE RR 2 29 RATIO W 2 29R GH2 GH3 86 68 AXLE RR 2 77 RATIO W 2 77R GH3 GH4 76 81 AXLE RR 2 28 RATIO W 2 28R GH4 GL1 76 81 DIFFERENTIAL CARRIER RR AXLE ALUMINUM W GL1 GM1 86 88 AXLE RR 2 59 RATIO W 2 59R GM1 GM3 85 88 AXLE RR 3 45 RATIO W 3 45R GM3 GM7 62 83 AXLE RR 2 39 RATIO W 2 39R GM7 GM8 76 88 AXLE RR 2 56 RATIO W 2 56R GM8 GN3 76 81 DRIVER CONTROL LEVELING W LVL CONT GN3 GS4 85 86 AXLE RR 3 70 RATIO W 3 7OR G54 X GT4 76 89 AXLE RR 3 73 RATIO W 3 73R GT4 GT5 76 89 AXLE RR 4 10 RATIO W 4 1OR GT5 GT8 76 89 AXLE HEAVY DUTY RR 4 10 RATIO W H D 4 10R GT8 GU1 76 88 AXLE RR 2 41 RATIO W 2 41R GU1 GU2 76 89 AXLE RR 2 73 RATIO W 2 73R GU2 GU3 82 85 AXLE RR 2 93 RATIO W 2 93R GU3 GU4 76 89 AXLE RR 3 08 RATIO W 3 08R GU4 GU5 76 89 AXLE RR 3 23 RATIO W 3 23R GU5 GU6 76 89 AXLE RR 3 42 RATIO W 3 42R GU6 GV4 82 87 AXLE RR 3 36 RATIO W 3 36R GV4 GV8 82 85 AXLE RR 2 72 RATIO W 2 72R GV8 GW4 84 85 AXLE RR 3 31 RATIO W 3 31R GW4 GW6 85 88 AXLE RR 3 27 RATIO W 3 27R GW6 GW9 76 B9 AXLE RR 2 93 RATIO W 2 93R GW9 GX3 82 88 AXLE FRT 3 33 RATIO W 3 33R GX3 GX4 76 83 AXLE RR 3 75 RATIO W 3 75R GX4 GX5 76 83 AXLE RR 4 09 RATIO W 4 O9R GX5 GY5 76 87 AXLE FRT 3 65 RATIO W 3 65R GY5 G44 85 88 AXLE RR 3 07 RATIO W 3 07R G44 GSO 76 89 SPRING HEAVY DUTY RR VAR 1 W H D RR SPR G50 G51 76 89 SPRING SPECIAL HEAVY DUTY RR VAR 2 W H D RR SPR G51 G52 82 88 SPRING EXTRA CAPACITY RR W H D RR SPR G52 G60 76 88 SPRING AUXILARY W AUX SPR G60 fx 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R I REV 1 88 RPO 11