1977 Corvette Pricing, Factory Options, & Colors

Base Corvette Sport Coupe (1YZ37)

• The base price of the 1977 Chevrolet Corvette Coupe without any optional equipment.
• A 350 cubic inch, 180 horsepower engine, 4-speed wide ratio manual transmission, leather interior trim, and T-tops were included in the base price.
• Leather seats were standard for the first time in 1977, but a cloth-leather combination could be substituted at no additional cost.
• The only engine-transmission combination available in California was the base 350 cubic-inch, 180 horsepower engine with the Turbo Hydra-Matic Automatic Transmission.

Power Windows (A31)

• Factory installed power driver and passenger windows.

Color Keyed Floor Mats (B32)

• Floor mats colored to match the vehicle’s interior trim coloring.

Rear Window Defroster (C49)

• An optional rear window forced air defogger.
• This option used glass heating elements instead of forced air and the naming convention changed from “defroster” to “defogger”.

Air Conditioning (C60)

• Factory installed, four-season air-conditioning.
• System includes evaporator, blower, condenser, receiver-dehydrator, refrigerant (freon) tank, air intake assembly and duct assembly for both systems.
• Includes an integrated heater.

Sport Mirrors (D35)

• Outside mirror assembly that included a mechanical linkage to control movement from inside the cockpit.

Gymkhana Suspension (FE7)

• An optional, heavier-duty suspension system for higher levels of performance.
• The Gymkhana rear leaf springs contained 9 leafs, though the top leaf is very small. GM identifies the rear leaf springs as an 8-leaf spring.
• Included a stiffer front sway bar and stiffer springs.
• There were no restrictions on ordering this option – it could be ordered with any engine/transmission combination.

Optional Rear Axle Ratios (G95)

• A selection of optional rear axle ratios.
• In 1977, these included: 3.08 (Code OA), 3.36 (Code OD), 3.36 (Code LR), 3.55 (Code OB), and 3.70 (Code OC)

Speed Control (K30)

• An early version of (what is commonly known today as) cruise control.
• The speed control option required an automatic transmission.

350ci, 210hp Engine (L82)

• Optional higher-output, small block V-8 engine.

4-Speed Manual Transmission, Close Ratio (M21)

• A close ratio version of the M20 Muncie 4-speed manual transmission.
• The gear ratios for the RPO M21 Close Ratio 4-Speed Manual Transmission are: 1st Gear – 2.20:1, 2nd Gear – 1.64:1, 3rd Gear – 1.28:1, 4th Gear – 1.0:1 (Direct).
• M21 was a no-cost option but required the optional L82 engine.

Turbo Hydra-Matic Automatic Transmission (M40)

• An optional, three-speed automatic transmission.
• The Turbo Hydra-Matic Automatic Transmission consisted of a 3-element hydraulic torque converter and compound planetary gear set. It was equipped with the following gear ratios: 1st Gear – 2.48:1, 2nd Gear – 1.48:1, and 3rd Gear – 1.00:1.
• The M40 Turbo Hydra-Matic Automatic Transmission was a no-cost option with the base 350 cubic inch, 180 horsepower engine, but cost $146.00 with the optional L82 engine.

High Altitude Emission Equipment (NA6)

• Alternate emission equipment installed for vehicles operating at high altitudes.
• The high-altitude emission equipment was required for vehicle operation at +4,000 feet.
• It was only available with the base 350 cubic inch, 180 horsepower engine and M40 transmission.

Tilt Telescopic Steering Column (N37)

• An optional, adjustable steering column and tilt-angle adjustable steering wheel.
• The Telescopic Steering Column changes the drivers distance from the steering wheel by literally telescoping the steering wheel closer to or further away from the vehicle operator.
• A new steering column positioned the steering wheel two inches closer to the instrument panel to provide more of an “arms out” driving position, and easier entry and exit.
• 1977 models without option N37 were equipped with 1976 style steering wheels.

White Letter Steel Belted Tires, GR70x15 (QRZ)

• Standard size tires with special raised white lettering.

Heavy Duty Battery (UA1)

• Optional, heavier-duty battery with increased cranking amps/capability.

AM-FM Radio, Stereo (U58)

• A standard/stock dealer installed Corvette radio.
• The radio received broadcast in FM 2-channel stereo, FM monaural, and AM monaural.
• 16-transistor 9-diode circuitry.
• Two-speakers.
• Fixed height rear antenna.
• In 1977, 1248 Corvettes were ordered without a radio.

AM-FM Radio (U69)

• A standard/stock dealer installed Corvette radio.
• The radio receives broadcast in FM monaural, and AM monaural.
• 16-transistor 9-diode circuitry.
• Two-speakers.
• Fixed height rear antenna.
• In 1977, 1248 Corvettes were ordered without a radio.

AM-FM Radio, Stereo with 8-Track Tape (UM2)

• The standard/stock radio equipped with an 8-Track Tape Player
• In 1977, 1248 Corvettes were ordered without a radio.

Luggage and Roof Panel Rack (V54)

• Externally mounted roof and luggage storage rack on the rear decklid of the car.
• The roof rack was designed to hold the T-top panels, permitting use of the full luggage compartment when the roof panels were removed

California Emission Certification (YF5) –

Aluminum Wheels (4) (YJ8)

• Included four aluminum wheels and a conventional steel spare.
• The aluminum wheels were originally expected for arrival as an option on the 1973 Corvette.
• The wheels were developed by Kelsey Hayes in Mexico.
• The wheels can be identified on their inside surfaces as to source and build location.

Trailer Package (ZN1)

• Factory installed trailer package.
• The trailer package included the Gymkhana Suspension, a higher-amp alternator and a heavy-duty radiator.
• The hitch was the standard, factory installed hitch available in 1977.
• The hitch could support approximately 100 pounds of tongue weight.

Convenience Group (ZX2)

• A group of convenience options available to consumers when purchasing a 1977 Corvette.
• The ZX2 Convenience Group included the dome light delay, headlight warning buzzer, underhood light, low fuel warning light, interior courtesy lights, and the passenger side visor mirror. Early in production, the low-fuel warning light wasn’t available, so Chevrolet deleted it and reduced the cost of the option to $18.00. Quantity of low-fuel light deletes was 3,881.

Notes

• A new console held heater and air conditioning controls and accepted standard Delco radios due to its increased depth.
• Early 1977 option listings contained CC1 glass roof panels ($200.00) but these were never available during the 1977 model year due to a marketing exclusivity dispute between Chevrolet and the panel vendor.
• Effective with 1Z37X7S427373, the alarm activator was moved from the driver-side fender to the driver-side door lock.
• Between August 23 and September 7, 1976, Flint Engine changed from orange paint to blue when painting the Corvette engine blocks. As such, early 1977 Corvette engine blocks were orange while later production engines were blue.
• The headlight dimmer and windshield wiper/washer controls were located on the steering column stalks.
  Sunshades were redesigned to permit swinging to the side windows.
• The interior rearview mirror mounting point was relocated from above the windshield to the windshield itself.