GM PRODUCTION OP FIONS RPO FY LY DIVISIONAL RPO DESCRIPTION SPOGM RPO DESCRIPTION FW8 84 84 AXLE FRT 1 99 RATIO W 1 99R EW8 EW9 82 88 AXLE FRT 3 43 RATIO W 3 43R FW9 FX2 84 85 AXLE ERT 2 66 RATIO W 2 66R EX2 EX3 85 86 SUSPENSION CONTROL ELEK DRIVER SELECT FIRM W ELEK SUSP CONT EX3 FX4 85 89 AXLE FRT 3 35 RATIO W 3 35R EX4 EX8 86 89 AXLE ERT 3 61 RATIO W 3 61R FX8 EY1 85 85 AXLE FRT 2 36 RATIO W 2 36R FY1 EY5 85 88 AXLE FRT 3 52 RATIO W 3 52R FY5 F01 82 88 ERAME HEAVY DUTY W H D ERM F01 F16 76 88 AXLE ERT 2 53 RATIO W 2 53R E16 E17 76 89 AXLE ERT 2 84 RATIO W 2 84R E17 E25 76 87 AXLE ERT 3 32 RATIO W 3 32R E25 E29 76 81 AXLE ERT 2 41 RATIO W 2 41R F29 E36 76 81 AXLE ERT 2 19 RATIO W 2 19R E36 F40 76 89 SUSPENSION HEAVY DUTY ERT RR W H D SUSP E40 E41 76 89 SUSPENSION SPECIAL HEAVY DUTY ERT RR W H D SUSP E41 E42 76 89 SUSPENSION HEAVY DUTY FRT W H D SUSP F42 E44 76 89 CHASSIS EOUIPMENT HEAVY DUTY W E44 E45 76 85 AXLE ERT 2 93 RATIO W 2 93R E45 F47 82 86 AXLE ERT 2 73 RATIO W 2 73R F47 F51 76 89 ABSORBER HEAVY DUTY SHOCK W H D SHK E51 E57 82 85 AXLE ERT 3 15 RATIO W 3 15R E57 F58 76 88 5HAFT HEAVY DUTY ERT STABILIZER W H D STAB E58 E59 76 88 STABILIZER FRT W E59 E60 76 89 SPRING HEAVY DUTY ERT W H D ERT SPR E60 E61 82 88 SHAFT STABILIZER RR W E61 F62 76 89 AXLE ERT 2 39 RATIO W 2 39R E62 E65 76 83 SUSPENSION FRONT AIR W AIR SUSP E65 F66 76 89 SUSPENSION HEAVY DUTY FRONT AIR W H D AIR SUSP E66 F67 82 86 AXLE ERT 3 19 RATIO W 3 19R E67 E68 82 89 AXLE ERT 3 45 RATIO W 3 45R E68 F71 82 84 SPRING W SHOCK ABSORBER HEAVY DUTY VAR 1 W H D SUSP E71 E72 82 87 SPRING W SHOC ABSORBER HEAVY DUTY VAR 2 W H D SUSP E72 E73 88 88 DRIVE ALL WHEEL W ALL WHL DRIVE E73 F75 76 89 AXLE ERT 3 18 RATIO W 3 18R E75 F77 82 88 AXLE FRT 3 73 RATIO W 3 73R F77 F79 82 89 AXLE FRT 2 97 RATIO W 2 97R E79 E85 76 81 SHAFT HEAVY DJTY ERT STABILIZER W H D STAB E85 E90 76 81 AXLE ERT 2 73 RATIO W 2 73R E90 CH2 76 88 AXLE RR 2 29 RATIO W 2 29R GH2 CH3 86 88 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 82 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 70R GS4 GT4 76 89 AXLE RR 3 73 RATIO W 3 73R GT4 GT5 76 89 AXLE RR 4 10 RATIO W 4 10R 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 CV4 82 87 AXLE RR 3 36 RATIO W 3 36R GV4 CVB 82 85 AXLE RR 2 72 RATIO W 2 72R GV8 CW4 84 85 AXLE RR 3 31 RATIO W 3 31R GW4 GW6 85 88 AXLE RR 3 27 RATIO W 3 27R GW6 CW9 76 89 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 09R GX5 GY5 76 87 AXLE ERT 3 65 RATIO W 3 65R GY5 G44 85 88 AXLE RR 3 07 RATIO W 3 07R G44 050 76 89 SPRING HEAVY DUTY RR VAR 1 W H D RR SPR G50 651 76 89 SPRING SPECIAL HEAVY DUTY RR VAR 2 W H D RR SPR G51 C52 82 88 SPRING EXTRA CAPACITY RR W H D RR SPR G52 C60 76 88 SPRING AUXILARY W AUX SPR G60 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17E REV 6 88 RPO 11