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==Code reuse== Through the years some codes have been reused. In one year or make and model, a code might mean ione thing, then in another year or for a different make and model it will mean something else. An example is G93. It has been used for a 3.27:1 as well as reportedly a 2.73 Rear Axle ('73 Olds). Other codes like M21 have been used for both Muncie and Borg Warner close ratio transmissions. *[http://www.gnttype.org/numbers/rpo.html Regular Production Option codes for 1985-1987 Regal] *[[General Motors build codes]] *[[GM RPO build codes]] *[[More GM RPO codes]] <pre style="border:none;"> A01 Soft Ray Tinted Glass, all windows A02 Tinted Glass, windshield only A20 Seatbelts - custom A20 Swing Out Rear Quarter Window A28 Sliding Rear Window A31 Power Windows A33 Power Tailgate Window A37 Seatbelt Equipment A39 Custom Deluxe front and rear Seat Belts A41 Power Bucket Seat, 4 way. A42 Power Seat, 6 way A43 Six Way Manual Seat Adjuster A46 Power Drivers Bucket Seat, 66+ A47 Custom Deluxe Seat Belts. A49 Custom Deluxe Seat Belts, w/retractors A51 Front Bucket Seats Astro type A52 Front Bench Seat A53 Front Bench Seat - Astro Type A61 Auxiliary Seat A62 Seat Belt Delete A63 Less Rear Seat Belt A64 Rear Seatbelts - custom A65 Split Front Seat w/arm Rest A66 Divided Second Seat A67 Folding Rear Seat (Camaro) A68 Standard Rear Center Seat Belt. '67 A75 H.D. Front Seat - Low Profile Type A76 H.D. Rear Seat A81 Head Rest, Bucket Seats A82 Head Rest, Bench Seat A85 Deluxe Shoulder Harness A90 Electric Trunk Opener A91 Rear Compartment Lid Release - Vacuum Control A93 Vacuum Door Locks, '69 A96 Rear Compartment Lock AG7 6 way Power Seat AK1 Custom Deluxe Seat Belts AL3 Power Door Locks AL4 Front Bench Seat - Special Contour (Strato) AL5 Deluxe Rear Center Seat Belt '67. AL6 Power Tailgate Release AN5 Lateral Restraint Seat AN6 Electric Seat Back Lock Release AN7 Strato-Bucket Seats, Swing out AQ2 Electric Seat Back Lock Release, '71 AQ5 Electric Seat Back Lock Release, '70 AQ5 Shoulder Harness - Std. AS1 Headrest - Special Contour Type Seat (Strato) AS1 Shoulder Harness AS2 Rear Seat Shoulder Harness Deluxe AS4 Deluxe Rear Seat Shoulder Harness AS4 Rear Seat Shoulder Harness - Std. AS5 Drivers Seat Adjustable Back AS5 Standard Rear Seat Shoulder Harness AT8 Reclining Passenger Seat AU1 Electric Door Locks, '70+ AU3 Power Door Locks AV3 3 Point Seat Belts (from 1972 Build sheet) B01 Heavy Duty Body B02 Taxi Equipment B07 Police Car B22 Door trim pad emblem " SS " B2H Interim Equipment Change B2M No power steering. B34 H.D. Front Floor Mat B35 H.D. Rear Floor Mat B37 Colored floor mats B39 Load Floor Carpet B44 Removable Load floor carpet B50 Foam Rubber Front Seat Cushion B55 Deluxe Front Seat Cushion B70 Instrument Panel Pad B75 lining lug compartment, '69 B80 Roof Drip molding B81 Delete tailgate molding B84 Body Side Molding B85 Beltline Reveal Molding B90 Door Window frame moldings B93 Door edge guards B94 "GMC" tailgate emblem ('71-'72 GMC Sprint only) B95 Rear end panel molding, '69 B96 Wheel well moldings BO1 Police Equipment BO2 Taxi '64-65. BW1 Delete tailgate ornamentation. BW2 Deluxe Body Side Molding BX4 Body Side Molding BX8 Full Body moldings C05 Folding Top Equipment C06 Convertible Top, Power C07 Auxiliary Top C08 Vinyl Roof, full" C14 2-Speed Windshield Wiper and Washer C24 Special Windshield Wipers C26 Power Operated Tailgate C28 Dual Action Tailgate C48 Heater Delete C49 Electro Clear defogger C50 Rear window defogger C51 Rear window air deflector C56 = I/P side vent /70 Upper Level Vent / Astro Ventilation C60 Air Conditioning - All Weather C61 A/Cond. Automatic Temp. Control C64 Air Conditioning C75 Air Conditioning Automatic Temperature Control CA1 Power Roof CB1 Vinyl Roof, Touring CB7 Vinyl Roof cover. CD2 Windshield Washer Level Control, '70+ CD3 Electro-tip Wipers, '70+ CE1 Headlight Washers CO5 Convertible Top, Manual CO6 Convertible Top, Power CO8 Vinyl Roof, full CO9 Padded Vinyl roof D10 Arm Rest Equipment D24 Litter container D31 Inside Non-Glare Rear View Mirror D33 Remote Control mirror D34 Vanity visor mirror D35 Sports mirrors D55 Console D64 Illuminated Visor Mirror D68 Twin Remote Sport Mirrors D80 Spoilers D88 Sport Stripe, '70+ D91 Conquista package D91 Front End Paint Stripe D92 Door Handle Decor Tape D96 Wide Paint Stripes D99 Two Tone Paint Moldings DX1 Front End and Hood Stripe DX3 Stripping Paint F40 Heavy Duty Front and Rear Suspension F41 Sport Front and Rear Suspension F51 Shock Absorber Equipment F60 Special Heavy Duty Front Suspension F62 Front Spring FE8 Radial Tuned Suspension FR1 Front Spring L.H. FR2 Front Spring R.H. G11 2.56 Rear Axle G1F Special Rear Axle 3.91 ,SS 1LE G31 Special Rear Spring G32 Rear Spring G33 Rear Spring L.H. G34 Rear Spring R.H. G50 Special Heavy Duty Rear Suspension G66 Air Shocks, rear G67 Controller for Air Shocks G75 3.70 rear G76 Rear Axle - 3.36 ratio G80 Rear Axle - Positraction G81 Differential Carrier - Positraction G82 4.56 Rear axle G84 4.10 Rear axle G91 Differential Carrier - 3.08 Ratio G92 Performance rear 3.08 G93 Differential Carrier - 3.27 Ratio G94 3.31 rear axle ratio G95 Differential Carrier - 3.55 Ratio G95 Economy rear 2.73 G96 3.55 rear axle ratio G97 2.73 Rear ratio GR3 Rear Axle and Multi-Leaf Suspension Conversion GS1 2.73 Ratio Axle (from 1972 Build Sheet) GS2 Rear Axle - 3.08 Ratio GS3 Rear Axle - 3.73 Ratio GS4 Differential Carrier - 3.70 Ratio Positraction GS5 Differential Carrier - 4.11 Ratio GS6 Differential Carrier - 4.56 Ratio Positraction GS8 Rear Axle 3.42 Ratio GS9 Rear Axle 3.73 Ratio GT1 2.56 rear axle ratio GT2 Rear Axle - 2.29 Ratio GT4 Rear Axle - 3.73 Ratio GT5 Rear Axle - 4.10 Ratio GT6 Rear Axle - 3.42 Ratio GV1 Differential Carrier - 2.73 Ratio Positraction GV2 Differential Carrier - 3.08 Ratio GV3 Differential Carrier - 3.08 Ratio GV4 Differential Carrier - 3.36 Ratio GV5 Differential Carrier - 3.55 Ratio GV7 Differential Carrier - 3.55 Ratio GV8 Differential Carrier - 4.11 Ratio GV9 Rear Axle 2.53 Ratio GW2 Rear Axle 2.56 Ratio GW3 Rear Axle 2.56 Ratio GW4 Rear Axle 2.56 Ratio GW5 273 Ratio Axle GW5 Rear Axle 2.73 Ratio GW7 Rear Axle 2.73 Ratio GW8 Rear Axle 4.10 Ratio GX1 Rear Axle 3.07 Ratio GX2 Rear Axle 3.07 Ratio GX5 Rear Axle 3.08 Ratio GX9 Rear Axle 2.92 Ratio GY2 Rear Axle 3.31 Ratio ('71-'72 Chevelle / El Camino / GMC Sprint). GY4 Rear Axle 3.73 Ratio GZ1 Rear Axle 3.08 Ratio GZ3 Rear Axle 3.08 Ratio GZ5 Rear Axle 3.42 Ratio GZ6 Rear Axle 3.42 Ratio H01 3.07 rear axle ratio H05 3.73 rear axle ratio HO1 3.07 rear axle ratio HO5 3.73 rear axle ratio J1E ENGINE, LS3 ONLY, SPECIAL ORDER, COMP, (SEO) 465-465 HP J50 Vacuum Power Brake Equipment J52 Front Disc Brakes J55 Heavy Duty Brakes J56 Heavy Duty Brake J61 Shoe and Drum Type Brake (Disc Brakes Deleted) J65 Metallic Brake Equipment JL2 Front Disc Brakes, '70+ JL8 ('69 only) 4-wheel disc brakes K02 Clutch Fan K02 Fan Drive K05 Engine Block Heater K19 AIR , smog pump, '66+ K19 Air Injection Reactor K21 Engine Controlled Combustion System K24 Closed Engine Positive Ventilation K30 Cruise Control K45 Air Cleaner - Oil Bath Type 1 Lb. Capacity K46 Air Cleaner - Heavy Duty Pre-Cleaner K47 Air Cleaner - Oil Bath Pre-Cleaner K66 Transistor Ignition. K72 Emission Control Delete K75 Emission Control Delete K76 61 amp alternator K77 55 amp alternator K79 42 amp alternator K81 62 Amp. Generator - Delctotron K82 A/C Generator - 52 amp K84 Amp. Generator - Delcotron K85 63 amp KD5 Heavy Duty PCV System KO2 Clutch Fan KO5 Engine Block Heater L11 L4 Engine - 170 Cu. In. OHC Alum. L13 L4 Engine - 140 Cu. In. OHC Alum. L14 307 CID STD V8 (from 72 Chevelle) L22 Six Cylinder 250 L26 L6 Engine - 230 L30 327-275 Hp L32 V8 Engine - 283 2 bbl L34 396-350 Hp L35 396-325 Hp L36 V-8 Engine - 427 Cu. In. Hi-Perf. L46 V-8 Engine - 350 Cu. In. L48 350-300hp L61 L6 Engine - 230 L62 P-6 Engine - Hi-Perf. L63 P-6 Engine - Spec. Hi-Perf. L65 350-145 2 barrel L66 V-8 Engine - 396 Cu. In. (2 Bbl. Carb) L68 V-8 Engine - 427 Cu. In. - Hi-Perf. - Tri-Carb. L71 V-8 Engine - 427 Cu. In. - Spec. Hi-Perf. - Tri-Carb. L72 427-425hp Yenko, '69 L73 327-250 HP, '68 L73 V-8 Engine - 396 Cu. In. - Spec. Hi-Perf. L74 V8 Engine - 327 high perf L77 4 barrel carb, 283-220 hp L78 396-375 Hp L78 V-8 Engine - 396 Cu. In. - Spec. Hi-Perf. L79 327-350 Hp L79 V-8 Engine - 327 Cu. In. - LD - Spec. Hi-Perf. (Hyd. Lifters) L85 L-6 Engine - 250 Cu. In. (4 Bbl. Carburator) L87 P-6 Turbo Charged Engine L88 V-8 Engine - 427 Cu. In. Heavy Duty L89 396-375hp, Aluminum Heads " L90 Low Compression Engine 6 Cyl. (Export) L90 Six cylinder L92 Low Compression Engine V8 (Export) LF6 400-255hp 2 bbl, '70 (Monte Carlo) " LF7 V-8 Engine - 327 Cu. In. (2 Bbl. Carb.) (Reg. Fuel) LM1 350-255hp, '69 " LO8 Engine Emission Identification Chart LS1 V-8 Engine - 427 Cu. In. (4 Bbl. Carb.) (Reg. Fuel) LS3 400-330hp, '70+ LS4 454-235hp LS5 454-365hp in '71...270hp in '72 LS5 454-360hp in '70 LS6 454-450hp, '70 LS7 V-8 Engine 454 Cu. In. 4 Bbl. Heavy Duty LT1 V-8 Engine - 350 Cu. In. - Special High Performance LT4 400-180hp M01 Heavy Duty Clutch M10 Overdrive M11 Floor Shift Transmission, '71+ M13 Heavy Duty Transmission M20 4 spd standard transmission. M21 4 spd close ratio M22 4 spd, Heavy Duty" M35 Powerglide automatic, 2 speed. M38 Turbo 350 automatic M40 Turbo 400 automatic M55 Transmission Cooler MB1 2-Speed Transmission - Manual Shift MC1 Heavy Duty 3 spd Transmission MO1 Heavy Duty Clutch N03 Gas Tank - 36� Gallon and Wheelhouse N10 Dual Exhaust N11 Off Road Service Exhaust N14 Side Mounted Dual Exhaust N30 Deluxe Steering Wheel N31 Custom Steering wheel N32 Steering Wheel - Wood N33 Tilt steering N34 Wood grained steering wheel N36 Steering wheel adjustable N37 Steering Wheel - Tilt- Telescopic N40 Power Steering N41 Power steering N44 Steering special N61 Dual Exhaust - Deep Tone Muffler N65 Space saving spare N66 Super Sport Wheel, Hub Cap & Trim Ring N89 Aluminum Wheel - 15 x 6 N95 Wire Wheel covers N96 Simulated Magn. Hubcaps NA9 Evaporative Emission Controls NB2 Refers to:: EXH EMISSION (from 72) NC8 Chambered Exhaust System NF2 Dual Exhaust - Deep Tone Muffler NK1 Cushioned Steering Wheel NK2 Custom Steering Wheel, '71+ NK2 Deluxe Vinyl Steering Wheel NK4 Sport Steering Wheel, '71+ P01 Wheel Trim Cover P02 Standard Wire Wheel Cover P06 Wheel Trim Ring P12 14 x 6 JK Wheel P19 Spare tire lock P25 Snow tire P42 15 x 6 J Wheel P42 Wheels 15 x 8 P48 15 x 6 L Wheel (Quick Take Off) P49 Chrome Wheel P50 6.00-13-4 White Wall Tires P53 6.50-14-4 White Wall Tires P54 7.00-13-4 White Wall Tires P58 7-14.4 Whitewall tires P61 7.75-14 W/W P62 7.75-14.4 W/W P67 6.50-14-4 White Wall tires P77 8.25-14 w/w P90 G70-15 White Stripe P91 G70-15 Red Stripe PA2 Simulated Wire Wheels, 2nd style PA3 Deluxe Wheel covers PE1 Turbine 1 wheels PE2 Turbine 2 wheels PK2 G78-14 w/w PK4 G70-14 Red Stripe PL2 E78X14 B/WALL PL3 E78-14 White Stripe PL4 F70-14 F70-14 White Stripe PL5 F70-14 White Letters PM6 G78-14 White Stripe PM7 F60-15 White letters, SS models. (also on Sprint SP models) PN5 7.75-14 8 ply tires PO1 Wheel Trim Cover PO2 Simulated Wire Wheels, 14" PO6 Wheel Trim Rings PQ7 8.25-14 w/w tires PR3 8.25-14 8 ply w/w PU8 G78-15 White Stripe PW7 F70-14 White Stripe PW8 F70-14 Red Stripe Tires PX5 F78X14 Black Wall Belted (�70) PX6 F78-14 w/w PX8 G70-14 w/w PX9 G70-14 Dual White Stripe tires PY4 F70-14 w/w PY5 F70-14 Red Stripe PY7 G70-14 Red Stripe QDR gr78-15 radial whitewalls QEH E78-14 bias White Stripe QEL HR78-15 Radial white stripe QGF G70-14 Bias White stripe QGK G78-14 QGL G78-14 bias white stripe QHE H78-14 Bias QHF H78-14 Bias white stripe QQZ HR70-15 radial whitewall QRM GR70-15 radial whitewall QRN GR70-15 Radials QRV HR70-15 Radials QRZ GR70-15 Radial White Letter T11 6.95-14-8 White Wall Tires T15 7.75-15 8 Ply tires T58 Rear wheel skirts T60 Heavy Duty Battery T78 Lights, front fender T81 Headlamp Light Watch & Off Control T83 Headlight retractable covers TJ2 Front Fender Louver TO7 7.75-14 W/W tires U03 Low Note Horn U05 Dual Horn U14 Instrumentation package U15 Speed Warning Indicator U16 Tachometer U17 Cluster INST (Oil coolant, AM/FM, Clock, Gas, Tach) U18 Export Speedometer U23 Ignition Lock Light U25 Trunk Light U26 Under hood Light U27 Glove box Light U28 Ash Tray Light U29 Instrument Panel Courtesy Lighting U35 Clock U37 Cigarette Lighter U46 Lamp Monitoring Equipment U57 8 Track Tape Player U58 AM/FM U60 Manual radio U63 AM push button radio U63 Radio - AM push button U69 Radio - AM/FM push button U73 Manual Rear Antenna U75 Power Rear Antenna U76 Antenna in windshield U79 Stereo Equipment U80 Rear Speaker UA1 Heavy Duty Battery UA6 Horn Alarm System UF1= Mirror Lamp (available in '70-'72) UF7 Econo-minder Gauge package UM1 AM radio with tape, '70+ UM2 AM/FM with tape UO3 Low note horn UO5 Dual horns V01 Heavy Duty Radiator V20 Front Grill Guard Equipment V30 Bumper Guards. Full set V31 Front Bumper Guards V32 Rear Bumper Guards V54 Deluxe Adjustable Roof Luggage Carrier V55 Roof Rack V74 Hazard Warning Equipment, '66 V75 Traction Dispenser set-up. V78 Less Certificate of Compliance plate - Export VE3 Special Front Bumper VE5 Deluxe bumper strips VF3 Deluxe Front and Rear Bumper VO1 Heavy Duty Radiator VO2 Heavy Duty Radiator, '64 " W84 Additional fuel for delivery X11 Style Trim for base car or SS X22 Style Trim for SS with 396 X33 Style Trim for Z/28 or RS with Z/28 option X44 Base Car X55 Base SS with 350 X66 Base SS with 396 X77 '69 Z-28 Camaro Norwood OH cars only YB5 General Processing Option YC1 Differential Carrier - 3.08 Ratio Positraction YC2 Differential Carrier - 3.36 Ratio Positraction YC3 Differential Carrier - 3.55 Ratio Positraction YC4 Differential Carrier - 3.11 Ratio Positraction YC6 SS 454 Conversion YD1 Trailering Axle YE1 Rear Axle - Special Ratio 3.70:1 YE2 Rear Axle - Special Ratio 4.11:1 YE4 Deluxe Interior and Exterior YE7 Special Performance "SP"" package YF1 Nova Rally Package YF3 The Heavy Chevy Package YF5 Emission Tested YF9 Special Deluxe Equipment YG5 Acoustics, Appearance and Convenience Equip. YJ9 Exterior dress up package Z01 comfort and Convenience Equipment Z02 **SPEC PAINT** (�72) Z03 Impala Super Sport Z04 Heavy Duty Chassis Z06 S.S. 396 Z10 Pace car coupe Z11 Indy pace car convertible Z12 Speedometer Driven Gear & Fitting Z13 Comfort and Convenience Equipment Z14 Air Conditioning (All Weather) Body Conversion Z15 SS equipment. (454 in '70) Z16 Special Sport Coupe - 65 Chevelle Z17 Special Suspension and Steering Z19 Convenience Group, '66. Z20 Monte Carlo SS 454 Z21 Style trim group Z22 Rally Sport Z23 Interior Decor Package Z23 Special interior package Z24 SS 427 package (Domed hood w/chrome insert, Special moldings "SS427" in grill and trunk molding) Z25 Chevelle SS option package Z25 SS 396 Z26 Super Sport Z27 SS equipment Z27 Super Sport Z28 Special performance package Z29 Vinyl Stripe Z49 Canadian Base Equipment Z52 Full Foam Seat Z53 Ammeter, Oil Pressure and Temperature Gauge Z55 Special Vehicle Identification Number Plate Z57 Vinyl Coated Trim Z67 Speedometer Driven Gear Adapter & Keys Z83 Road Hazard Package, '66. Z87 Deluxe Interior Z95 Regular Fuel Engine Equipment ZJ1 Custom Interior ZJ2 Custom Exterior ZJ3 Interior Convenience Package ZJ5 Exterior Decor ZJ6 Special Sport Sedan ZJ7 Ralley Wheels ZJ7 Steering Wheel Deluxe Trim ZJ9 Auxiliary lighting group ZK1 Body Insulation Package ZK3 Deluxe Seat Belts, and Front Shoulder Harness ZK5 Concours Sedan, '68 ZK7 Concours Sport Sedan, '68 ZK8 Tire Pressure Label, '70 ZKQ Tire pressure sticker ZL2 Special Hood, Cowl Induction, '70+ ZL3 SS 396 CONVER-- ZO1 Comfort and Convenience Group, '64-65 ZO2 Pushbutton Radio and extra speaker, '64 ZO4 Heavy Duty Chassis, '64-65. ZO8 Body Molding/Trim ZO9 Performance Rear Axle, '70+ ZP2 Trim & color override ZP5 Appearance guard group ZQ2 Operating Convenience Group ZQ8 Rear Axle Economy Ratio ZQ9 Rear Axle - Performance Ratio ZR1 Off Road Package (LT1) ZR2 Off Road Package (LS7) ZR3 Refers to: Off road package 454(LS7 & LT2) 69 ZW4 Std Trans 3spd (70) </pre>
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