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The 1990 Chevrolet Corvette

1990 Red Convertible Corvette

1990 was the year for the eagerly anticipated "King of the Hill" Corvette ZR-1. The ZR-1 was the highest cost production car in the GM inventory. The ZR-1 engine is a Lotus-designed 32-valve, dual-overhead-cam, 350-cubic inch (5.7-liter) V-8 with 16 fuel injectors (8 primary, 8 secondary), built by Mercury Marine in Oklahoma. ZR-1 also included new body styling and wider rear to cover the massive 315/35ZR-17 rear tires. The FX3 Selective Ride Adjustment was a standard feature on ZR-1's as well as the 6-speed manual gearbox. The ZR-1 rear body styling included a convex rear with rectangular lights, the standard Corvette has a concave rear with round lights. The engine oil cooler was now standard along with 17" wheels. ABS-II anti-lock braking system was also standard. A drivers side airbag is now standard equipment on all 1990 Vettes.

Production Options and Build Statistics

Total 1990 Corvettes Built - 26,412
Total 1990 Coupes (includes ZR-1) - 16,663
Total 1990 Convertibles - 9,749 Total 1990 ZR1 - 3,049

Coupe Serial Numbers: 1G1YY238xL5100001 to 1G1YY238xL5120597
Convertible Serial Numbers: 1G1YY338xL5100001 to 1G1YY338xL5120597
ZR-1 Serial Numbers: 1G1YZ23JxL5800001 to 1G1YZ23JxL5803049 ;

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.

Position Character Description
1 1 US built
2 G General Motors product
3 1 Chevrolet Motor Division vehicle
4&5 YY Basic Corvette
YZ Corvette ZR-1
6 2 or 3 Body style number
2 = Two door hatchback style 07, 08, 77, or 87
3 = Two door convertible style 67
7 1 or 2 1=Manual seat belts
3=Manual belts with driver-inflatable restraint system
4=Automatic belts
8 8 L98 5.7-liter Tuned-Port-Injection Chevrolet or GM of Canada V8
J LT5 - 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
10 L The model year L=1990
11 5 Bowling Green, KY
12-17 100001 and up Production Sequence
800001 and up Production sequence for ZR-1s

Engine Serial Number

1990 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.

Code Engine Horsepower Compression Transmission Fuel Supply Extra Features
ZSA L98 350-cid 245/250-hp V-8 9.5:1 THM automatic ;
ZSB L98 350-cid 245/250-hp V-8 9.5:1 Manual Tuned Port Injection Engine Oil Cooler
ZSC L98 350-cid 245/250-hp V-8 9.5:1 THM Automatic Tuned Port Injection Engine Oil Cooler;
ZSD LT5 350-cid 375-hp V-8 11.0:1 Manual Tuned Port Injection Air Conditioning
ZSD LT5 350-cid 375-hp V-8 11.0:1 Manual Tuned Port Injection Electronic Air Conditioning
250 horsepower engines were in coupes with the 3.07:1 rear end only. 245 horsepower engines were in all other coupes and all convertibles.

Production Options

RPO Description Price Production
1YY07 Base Coupe $31,979 16,016
1YY67 Base Convertible $37,264 7,630
AC1 Power Passenger Seat $270.00 20,419
AC3 Power Driver Seat $270 23,109
AQ9 Leather Sport Seats $1,050 11,457
AR9 Base Leather Seats $425 11,649
B2K Callaway Twin Turbo $26,895 58
CC2 Auxiliary Hardtop (Convert.) $1,995 2,371
C2L Dual Removable Roof Panels $915 6,422
24S Removable Roof Panel, blue tint $615 7,852
64S Removable Roof Panel, bronze tint $615 4,340
C68 Electronic Air Conditioning $180 22,497
FX3 Selective Ride and Handling System $1,695 7,576
G92 Performance Axle Ratio, 3.07:1 $22 9,362
K05 Engine Block Heater $20 1,585
KC4 Engine Oil Cooler $110 16,220
MN6 6-spd, Manual Trans. $0.00 8,100
NN5 California Emission Requirements $100 4,035
UJ6 Low Tire Pressure Warning System $325 8,432
UU8 Delco Bose Stereo System $823 6,401
U1F Delco Bose CD Stereo System $1,219 15,716
V56 Luggage Rack (convert.) $140 1,284
Z51 Performance Handling Pkg. (coupe) $460 5,446
ZR1 Special Performance Handling Pkg. (coupe) $27,016 3,049
AJ3 Inflatable Restraint System N/A N/A
CC3 Removable Plastic Roof Panel N/A N/A
CF7 Non-Transparent Removable Roof Panel N/A N/A
C60 Manaul Control Air Conditioning N/A N/A
DL8 Twin Electric Remote Heated Sport Mirrors N/A N/A
D3X Speedometer Driven Gear (25513049) N/A N/A
D4D Speedometer Driven Gear (25513047) N/A N/A
D7B Speedometer Driven Gear (25513050) N/A N/A
D7C Speedometer Driven Gear (25513043) N/A N/A
D74 Illuminated Mirror, Inside Vanity Visor N/A N/A
D9A Speedometer Sensor (25007224) N/A N/A
D9B Speedometer Sensor (25007308) N/A N/A
FE1 Soft Ride Suspension N/A N/A
FE7 Heavy Duty Suspension N/A N/A
GH0 3.54 Rear Axle Ratio N/A N/A
GM1 2.59 Rear Axle Ratio N/A N/A
GM3 3.45 Rear Axle Ratio N/A N/A
GT7 3.33 Rear Axle Ratio N/A N/A
GU2 2.73 Rear Axle Ratio N/A N/A
G44 3.07 Rear Axle Ratio N/A N/A
G87 8.5 - Inch Ring Gear N/A N/A
JL9 Front and Rear Anti-lock Brakes N/A N/A
J55 Heavy Duty Brakes N/A N/A
K09 120 Amp Generator N/A N/A
K68 105 Amp Generator N/A N/A
L98 5.7 Liter, V-8 Engine, TPI N/A N/A
LT5 5.7 Liter, V-8 Engine, MPFI, DOHC N/A N/A
MD8 4-speed Automatic Transmission (4L60) N/A N/A
ML9 6-speed Manual Transmisson (ZF) N/A N/A
NK4 Steering Wheel, Sport Leather N/A N/A
QA1 Aluminum Wheel, 17x9.5 N/A N/A
QA2 Aluminum Wheels, 17x9.5 Front, 17x11 Rear N/A N/A
T61 Daytime Running Lamps N/A N/A
T93 Special Tail and Stop Lamps N/A N/A
UM6 Electronically Tuned Stereo with Cassette/Clock N/A N/A
U19 Instrument Cluster, Kilometers and Miles N/A N/A
UX0 Delco Bose 6-Speaker Stereo System N/A N/A
U19 Instrument Cluster, Kilometers and Miles N/A N/A
U52 Electronic Instrument Cluster N/A N/A
XAU Front Tire, P274/40ZR17 N/A N/A
YAU Rear Tire: P275/40ZR17 N/A N/A
YBE Rear Tire: P315/35ZR17 N/A N/A

Color Options for 1990

Interior options for exterior colors are suggested by Chevrolet. Other combinations could be ordered.
RPO Exterior WA # Interior Soft Top Production
10 White WA9567 B-BK-G-R-S B-S-W 4,872
25 Steel Blue Metallic WA9080 B-BK BK-W 813
41 Black WA8555 B-BK-G-R BK-W 4,759
42 Turquoise Metallic WA9543 BK-S BK-S 589
53 Competition Yellow WA9504 BK-G-S BK-S-W 278
68 Dark Red Metallic WA9239 BK-S BK-S-W 2,353
80 Quasar Blue Metallic WA9544 BK-G-R-S BK-S-W 474
81 Bright Red WA8774 BK-G-R-S BK-S-W 6,956
91 Polo Green Metallic WA9529 BK-S BK-S 1,674
96 Charcoal Metallic WA9192 BK-G BK-S 878
Color Codes: B=Blue, BK=Black, C=Cloth, G=Gray, L=Leather, R=Red, S=Saddle, W=White

Interior Colors

RPO Color Production
19C Black Cloth Base - 398
60C Saddle Cloth Base - 142
193 Black Leather Sport - 4,977
Base - 4,701
223 Blue Leather Sport - 341
Base - 395
603 Saddle Leather Sport - 1,373
Base - 2,050
733 Red Leather Sport - 3,397
Base - 3,070
903 Gray Leather Sport - 1,369
Base - 1,433

Convertible Top Color Codes

RPO Color Production
N/A Black 4,161
N/A Saddle 1,284
N/A White 2,205

1990 Corvette Specifications

Mechanical Dimensions

Feature Coupe Convertible ZR-1
Wheelbase 96.2 inches (2.443 m) 96.2 inches (2.443 m) 96.2 inches (2.443 m)
Overall length 176.5 inches (4.483 m) 176.5 inches (4.483 m) 177.4 inches (4.506 m)
Overall width 71.0 inches (1.803 m) 71.0 inches (1.803 m) 74.0 inches (1.880 m)
Overall height 46.7 inches (1.186 m) ; 46.7 inches (1.186 m)
Front tread 59.6 inches (1.514 m) 59.6 inches (1.514 m) 59.6 inches (1.514 m)
Rear tread 60.4 inches (1.534 m) 60.4 inches (1.534 m) 61.9 inches (1.572 m)
Front Tires P275/40ZR-17 Goodyear Eagle GT P275/40ZR-17 Goodyear Eagle GT P275/40ZR-17 Goodyear Eagle GT
Rear Tires P275/40ZR-17 Goodyear Eagle GT P275/40ZR-17 Goodyear Eagle GT P315/35ZR-17 Goodyear Eagle GT
Steering rack and pinion (power assisted)
Front suspension Single fiberglass composite monoleaf transverse spring with unequal-length aluminum control arms and stabilizer bar
Rear suspension Fully independent five-link system with transverse fiberglass single-leaf springs, aluminum upper/lower trailing links and strut-rod tie-rod assembly
Brakes Four-wheel power disc
Body construction Unibody with partial front frame
Fuel tank 20 US Gal (16.7 Imp Gal) (76 liters)

Engine Specifications

Feature Base Engine RPO L98 ZR-1 Engine RPO LT5
Type V-8, 90-degree Overhead valve V-8, 90-degree Overhead valve with 4 valves per cylinder and 4 overhead camshafts
Block Cast Iron with Aluminum Cylinder Heads Aluminum
Displacement 350 cid (5.7 liters) 350 cid (5.7 liters)
Bore & Stroke 4.00" x 3.48" 4.00" x 3.48"
Compression Ratio 9.5:1 11.0:1
Brake horsepower 245 @ 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
Torque 345 lb-ft @ 3200 370 lb-ft @ 5600
Main bearing Five Five
Valve lifters Hydraulic Hydraulic
Fuel supply Tuned-port induction (TPI) system Tuned-port induction (TPI) system
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