Used to calculate the characters in the serial number and gives it a single digit code that can be used to verify the serial number is legitimate. (Note: The Check digit number varies depending on each specific VIN number.)
F (Tenth Digit) - The Model Year. F - 1985
5 (Eleventh Digit) - Location of the Assembly Plant. 5 - Bowling Green, Kentucky
1XXXXX (Twelfth thru Seventeenth Digits) - Production Sequence Numbers.
The last six digits begin at 100001 and run thru 139729, accounting for each of the 39,729 Corvette Coupes built in 1985.
Each Vehicle Identification Number (VIN) is unique to an individual car.
For all 1985 Corvettes, the Vehicle Identification Number was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.
1985 CORVETTE FACTORY OPTIONS
CODE:DESCRIPTION: QUANTITY:RETAIL PRICE:
Base Corvette Sport Coupe
Power Driver Seat
Sport Seats, Leather
Base Seats, Leather
Sport Seats, Cloth
Power Door Locks
Removable Transparent Roof Panel
Delco-Bilstein Shock Absorbers
Performance Axle Ratio
4-Speed Manual Transmission
California Emissions Requirement
AM-FM Stereo Cassette
AM-FM Stereo, Citizens Band
Stereo System, Delco-Bose
Heavy Duty Cooling
Performance Handling Package
Rear Window + Side Mirror Defoggers
Base Corvette Roadster (1YY07) - The base price of the 1985 Chevrolet Corvette Coupe without any optional equipment.
The 1985 Corvette saw the return of true fuel injection with the introduction of the Tuned-Port Fuel Injection system that came standard with the more powerful L98 V-8 engine.
A 350 cubic inch, 230 horsepower engine, 4-speed automatic transmission, removable body-color roof panel, and cloth seats were included in the base price.
Sports Seat, Leather (AQ9) - Special sport seats that featured inflatable lumbar support and power-adjusted side bolsters.
The sports seat option, (which was available only in cloth in 1984), became available in leather as an interim 1985 option.
Leather seats sold in 1985 totaled 30,955 units, which included both the optional base seat in leather as well as the optional sport seat in leather.
Base Seats, Leather (AR9) - Leather cover option for the standard, base driver and passenger seats.
Sports Seat, Cloth (----) - Special sport seats that featured inflatable lumbar support and power-adjusted side bolsters.
Optional cloth version of the AQ9 option.
Power Door Locks (AU3) - Electronic locking system that replaced standard, manual door locks.
Removable Transparent Roof Panel (CC3) - Single piece, glass roof panel that gives driver an "open air" feel while driving.
All 1985 Corvettes were designed with one-piece, lift-off roof panels and rear hatch windows.
For 1985, the removable glass roof panel was manufactured with stronger sun screening.
Two Tone Paint (D84) - Optional paint scheme that allowed buyers the option of three, different, two-tone paint combinations.
Options included Silver/Grey, Light Blue/Medium Blue, and Light Bronze/Dark Bronze.
Delco-Belstein Shock Absorbers (FG3) - Gas shock absorbers with valving revised for improved ride.
The FG3 option offered the Z51's upgraded shocks without buying the full Z51 suspension package.
A joint venture between AC-Delco and premium shock manufacturer Bilstein, these stiffer shocks offered a firmer ride and improved handling characteristics.
Performance Axle Ratio (G92) - Optional performance axle ratio of 3.07:1.
Was only offered when the Corvette was ordered with an automatic transmission.
The actual "Performance Axle Ratio" varied from year to year. The G92 Option was available when ordering either the Corvette or the Camaro throughout the 1980's and early '90's.
Cruise Control (K34) - Automatic electric cruise control with "resume" and "accelerate" options.
4-Speed Manual Transmission (MM4) - Optional manual transmission that was offered as a zero dollar upgrade.
a "4+3", 4 speed manual transmission that was originally developed and built by Doug Nash Company.
The "4+3" transmission had overdrives in the top three gears for improved fuel economy.
In 1985, the 4+3 Manual Transmission came with a new, heavy duty 8.5 inch ring differential.
The manual transmission overdrive selector button was moved from the console to the shift knob itself.
Rear axle gear ratios for manual transmission models was 3.07:1.
California Emission Requirements (NN5) - Revised emission/exhaust components to meet California Emission standards
Radio Delete (UL5) - Optional removal of any stereo components from the Corvette.
AM-FM Stereo Cassette (UM6) - Electronically tuned stereo radio with cassette.
AM-FM Stereo, Citizens Band (UN8) - AM/FM stereo system with citizens band radio and hand held transmitter/microphone.
Stereo System, Delco-Bose (UU8) - Delco Bose AM/FM stereo radio with cassette.
Heavy Duty Cooling (V08) - Optional, three (3) core aluminum radiator.
Includes larger diameter transmission cooler.
Performance Handling Package (Z51) - Heavy Duty Steering and Suspension Upgrade for Improved Handling.
Included heavy-duty front and rear springs, shock absorbers, stabilizer bars and bushings, fast steering ratio, engine oil cooler, extra radiator fan (pusher), P255 / 50VR16 tires and directional alloy wheels (16 x 8.5 (front) and 16 x 9.5 (rear)).
Suspension rates were lowered in 1985 as a result of harsh ride criticisms from the previous model year. Springs for the base suspension were softer by 26% in front and 25% in the rear. Springs included in the Z51 option were 16% softer in the front and 25% softer in the rear.
To compensate for the spring change, larger diameter stabilizer bars were included with Z51 equipped models.
Rear Window + Side Mirror Defoggers (Z6A) - Components were equipped with heating elements (wire) for defogging.
The C4 Corvette used vertically run wire through it's rear window to achieve proper and timely defogging.
DISCLAIMER: While Corvsport.com makes every effort to ensure that this information is complete and accurate, you should always consult the manufacturer of your vehicle if you have a specific issue or question.