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The 1991 Chevrolet Corvette

        Turqoise Corvette Coupe

1991 Corvettes got the rear end look from the 1990 ZR-1 including the rectangular tail lights. A new front end as well including wrap around parking lights, new side panel vents and body color side moldings. The base wheels were changed to a new saw-blade design. The new RPO Z07 included the Z51 suspension components and the FX3 adjustable ride options, this provided an in-cockpit adjustable ride from stiff to very stiff. A power wire was added for accessories like cell-phones and a float based oil pressure monitor. A new power-delay feature allowed the windows and radio to work for a time after the ignition key was removed.

Production Options and Build Statistics

Total 1991 Corvettes Built - 20,639

Total 1991 Coupes - 14,967
Total 1991 Convertibles - 5,672
Total 1991 ZR-1s - 2,044

Serial Numbers
Coupe1G1YY238xM5100001 - 1G1YY238xM5118595
Convertible1G1YY338xM5100001 - 1G1YY338xM5118595
ZR-11G1YZ23JxM5800001 - 1G1YZ23JxM5802044

The "Vehicle Identification Number" (also VIN or serial number) is stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.

Serial Number Decoder

11US built
2GGeneral Motors product
31Chevrolet Motor Division vehicle
4-5YYBasic Corvette
4-5YZCorvette ZR-1
62 or 3Body style number
2 = Two door hatchback style 07, 08, 77, or 87
3 = Two door convertible style 67
71 or 21=Manual seat belts
3=Manual belts with driver-inflatable restraint system
4=Automatic belts
88L98 5.7-liter Tuned-Port-Injection Chevrolet or GM of Canada V8
8JLT5 - 5.7-liter TPI V-8
9?A check digit that calculates the characters in the serial number and gives it a single digit code and can be used to verify that the serial number is legitimate
10MThe model year M=1991
115Bowling Green, Kentucky
12-17100001 and upProduction Sequence for Coupes and Convertibles
12-17800001 and upProduction Sequence for ZR-1s

Engine Serial Number Decoder

1991 Corvette engines have the last six digits of the VIN stamped on the block after the engine number. The date code the engine was manufactured was also cast into the block. The engine serial number includes a production sequence number starting with 0001001 and one of the suffixes below.

CodeEngineHorsepowerCompressionTransmissionFuel SupplyExtra Features
ZTAL98 350-cid245/250-hp V-810.0:1AutomaticTuned Port Injection (TPI);
ZTBL98 350-cid245/250-hp V-810.0:1ManualTuned Port Injection (TPI)Engine Oil Cooler
ZTCL98 350-cid245/250-hp V-810.0:1AutomaticTuned Port Injection (TPI)Engine Oil Cooler
ZTKLT5 350-cid375-hp V-811.0:1ManualTuned Port Injection (TPI);

Production Options

1YY07Base Coupe$32,455.00 14,967 72.5%
1YY67Base Convertible$38,770.00 5,672 27.5%
AC1Power Passenger Seat$290.00 17,267 83.7%
AC3Power Driver Seat$290.00 19,937 96.6%
AQ9Leather Sport Seats$1,050.00 10,650 51.6%
AR9Base Leather Seats$425.00 N/A N/A
B2KCallaway Twin Turbo$33,000.00 62 0.3%
CC2Auxiliary Hardtop (Convert.)$1,995.00 1,230 6.0%
C2LDual Removable Roof Panels$915.00 5,031 24.4%
24SRemovable Roof Panel, blue tint$615.00 6,991 33.9%
64SRemovable Roof Panel, bronze tint$615.00 3,036 14.7%
C68Electronic Air Conditioning$180.00 19,233 93.2%
FX3Selective Ride and Handling System$1,695.00 6,894 33.4%
G92Performance Axle Ratio$22.00 N/A N/A
KC4Engine Oil Cooler$110.00 7,525 36.5%
MN66-spd, Manual Transmission$0.00 5,875 28.5%
NN5California Emission Requirements$100.00 3,050 14.8%
UJ6Low Tire Pressure Warning System$325.00 5,175 25.1%
UU8Delco Bose Stereo System$823.00 3,786 18.3%
U1FDelco Bose CD Stereo System$1,219.00 15,345 74.3%
V56Luggage Rack (convertible)$140.00 886 4.3%
Z07Adjustable Suspension Pkg. (coupe)$2,155.00 733 3.6%
ZR1Special Performance Handling Pkg. (coupe)$31,683.00 2,044 9.9%
AJ3Front Seat Inflatable Restraint SystemN/A N/A N/A
CC3Removable Plastic Roof PanelN/A N/A N/A
CF7Removable Roof Panel (Solid Body Color)N/A N/A N/A
C60Manual Air Conditioning ControlsN/A N/A N/A
DC7Electronic LH & RH Outside MirrorsN/A N/A N/A
DC8Electronic LH & RH Outside MirrorsN/A N/A N/A
DL8LH/RH Heated Sport MirrorsN/A N/A N/A
D3XSpeedometer Driven Gear (25513049)N/A N/A N/A
D4LSpeedometer Driven Gear (25513050)N/A N/A N/A
D7BSpeedometer Driven Gear (25513043)N/A N/A N/A
D7CSpeedometer Driven Gear (25513045)N/A N/A N/A
D8EVehicle Speed Sensor (10456021)N/A N/A N/A
D8FVehicle Speed Sensor (10456022)N/A N/A N/A
D8HVehicle Speed Sensor (10456039)N/A N/A N/A
FE1Soft Ride SuspensionN/A N/A N/A
FE7Heavy Duty SuspensionN/A N/A N/A
GM12.59 Rear Axle RatioN/A N/A N/A
GM33.45 Rear Axle Ratio (8.5 in. Ring Gear)N/A N/A N/A
GU22.73 Rear Axle RatioN/A N/A N/A
G443.07 Rear Axle RatioN/A N/A N/A
JL9Antilock Front and Rear Disc BrakesN/A N/A N/A
J55Heavy Duty BrakesN/A N/A N/A
K05Engine Block Heater (Canada Export only)N/A N/A N/A
K09120-Amp GeneratorN/A N/A N/A
K68105-Amp GeneratorN/A N/A N/A
L988-Cyl., V8, 5.7L (Vin 8) EngineN/A N/A N/A
LT58-Cyl., V8, 5.7L (Vin J) EngineN/A N/A N/A
MD84-Spd. 4L60 Automatic TransmissionN/A N/A N/A
na5Federal Emission systemsN/A N/A N/A
NK4Sport Leather Steering WheelN/A N/A N/A
QA1Wheel, 17 x 9.5, AluminumN/A N/A N/A
QA2Wheels, 17 x 9.5 (Front), 17 x 11 (Rear), AluminumN/A N/A N/A
T61Daytime Running LightsN/A N/A N/A
UM6Bose Stereo w/ CD & Cassette, Seek/Scan, Clock, ETR RadioN/A N/A N/A
UXODual Floor Sill & Extended Range Speaker SystemN/A N/A N/A
U19Miles & Kilometers Dash ClusterN/A N/A N/A
U52Electronic Instrument ClusterN/A N/A N/A
U75Power AntennaN/A N/A N/A
XAUFront Tire, P275/40ZR17N/A N/A N/A
YAURear Tire, P275/40ZR17N/A N/A N/A
YBERear Tire, P315/35ZR17N/A N/A N/A

Color Options for 1991

Interior options for exterior colors are suggested by Chevrolet. Other combinations could be ordered.
Soft Top Color
Interior Color
10White$0.00BG-BK-WB-BK-G-R-S 4,305 20.9%
25Steel Blue Metallic$0.00B-BK-WB-BK 835 4.0%
35Yellow$0.00BG-BK-WBK-G-S 650 3.1%
41Black$0.00BG-BK-WB-BK-G-R-S 3,909 18.9%
42Turquoise Metallic$0.00B-BKBK-S 1,621 7.9%
75Dark Red Metallic$0.00BG-BK-WBK-S 1,311 6.4%
80Quasar Blue Metallic$0.00BG-BKBK-S 1,038 5.0%
81Bright Red$0.00BG-BK-SBK-G-R-S 5,318 25.8%
91Polo Green Metallic$0.00BG-BKBK-S 1,230 6.0%
96Charcoal Metallic$0.00BK-WBK-G-S 417 2.0%
Color Codes: B=Blue, BG=Beige, BK=Black, C=Cloth, G=Gray, L=Leather, R=Red, S=Saddle, W=White

Interior Colors

19CBlack Cloth$0.00 379 1.8%
60CSaddle Cloth$0.00 105 0.5%
193Black Leather$0.00 10,376 50.3%
223Blue Leather$0.00 809 3.9%
603Saddle Leather$0.00 3,084 14.9%
733Red Leather$0.00 4,481 21.7%
903Gray Leather$0.00 1,889 9.2%

Convertible Top Colors

N/ABlue (Only available on Steel Blue Metallic and Turquoise Metallic paint)1622.9%

1991 Corvette Specifications

Mechanical Dimensions

Wheelbase96.2 inches (2.443 m)96.2 inches (2.443 m)96.2 inches (2.443 m)
Overall length176.5 inches (4.483 m)176.5 inches (4.483 m)177.4 inches (4.506 m)
Overall width71.0 inches (1.803 m)71.0 inches (1.803 m)74.0 inches (1.880 m)
Overall height46.7 inches (1.186 m);46.7 inches (1.186 m)
Front Tread59.6 inches (1.514 m)59.6 inches (1.514 m)59.6 inches (1.514 m)
Rear Tread60.4 inches (1.534 m)60.4 inches (1.534 m)61.9 inches (1.572 m)
Front TiresP275/40ZR-17 Goodyear Eagle GTP275/40ZR-17 Goodyear Eagle GTP275/40ZR-17 Goodyear Eagle GT
Rear TiresP275/40ZR-17 Goodyear Eagle GTP275/40ZR-17 Goodyear Eagle GTP315/35ZR-17 Goodyear Eagle GT

Engine Specifications

FeatureBase Engine RPO L98ZR-1 Engine RPO LT5
TypeV-8, 90-degree Overhead valveV-8, 90-degree Overhead valve with 4 valves per cylinder and 4 overhead camshafts
BlockCast Iron with Aluminum Cylinder HeadsAluminum;
Displacement350 cid (5.7 liters)350 cid (5.7 liters)
Bore & Stroke4.00" x 3.48"4.00" x 3.48"
Compression Ratio10.0:111.0:1
Brake Horsepower245 @ 4000 (250-hp for hatchbacks using 3.07:1 rear axle due to use of low-restriction mufflers with this option combination only)375 @ 5800 rpm
Torque340 lb-ft @ 3200370 lb-ft @ 5600
Main BearingFiveFive
Valve LiftersHydraulicHydraulic
Fuel SupplyTuned-port induction (TPI) systemTuned-port induction (TPI) system

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