1956 Corvette Original Facts

There were 3,467 Corvettes made in 1956. All were Convertibles.

Serial Numbers 

E56S001001 through E56S004467

The final serial number was 00384 on August 8th 1956. (This came from service bulletin information). Body build date information codes were not placed on the Corvette until 1963

The E is the Chevrolet indicator for Corvette. The 56 is the year. The S is the Assembly Plant Code for St. Louis. And the last 6 digits is the sequence manufacture number. There is no clear link to engine numbers and the serial numbers for 1956. Engine numbers were followed by the Plant identifier and the engine suffix code. The code can be found on a pad just in front of the cylinder head on the right front top of the engine. The VIN Plate is attached to the door hinge pillar just below the upper hinge.

Block Numbers

All blocks of this year have the same number 3720991 It is located as above. All engines are V-8 and are 265 cubic inches.

Engine Suffix Identification

FG - 256ci, 225hp, 2X4BC, automatic transmission, Powerglide with an axle ratio of 3.55:1

FK - 265ci, 210hp, 1X4BC, automatic transmission, Powerglide with an axle ratio of 3.55:1

GR - 265ci, 225hp, 2X4BC manual transmission, 3 speed with an axle ratio of 3.70:1 or option of 3.27:1 or 4.11:1

GU - 265ci, 240hp, manual transmission, 3 speed with an axle ratio of 3.70:1 or option of 3.27:1or 4.11:1. Note, RPO 469 w/Hi-Lift camshaft was not believed to have had the horsepower published and the rating of 240 is not official.

GV - 265ci, 210hp, 1X4BC, manual transmission, 3 speed with an axle ratio of 3.70:1 or option of 3.27:1 or 4.11:1

Rear Axle Codes

Rear axle codes are located by the use of a stamp on the front right side of the differential carrier housing. The code will be followed by the month of manufacture, (1-12 or 01-12) and then the day of manufacture, (01-31). There may also be a HT stamped, along with the gear ratio, which would stand for Hi-Tork used for Positraction Rear axles. These were rare and were only used on the 3.70:1 and 4.11:1 rear ends.

AE 3.55:1, Powerglide

AH 3.70:1, 3-Speed

AD 3.27:1, 3-Speed

AJ 4.11:1, 3-Speed

 

Carbureted Intake Manifold Numbers

3735448 Cast Iron 20 Horsepower

3837109 Cast Iron 20 Horsepower

3728725 Aluminum 1st design 225 Horsepower

3731394 Aluminum 2nd design 225 Horsepower and 240 Horsepower

Exhaust Manifold Numbers

1st design, all engines 3725563 Left side and 3725563 Right side

2nd design, all engines 3731557 Left side 3731558 Right side

Head numbers

For the 265ci, 210hp and the 225hp, this is a 2 bolt exhaust, the number is 3725306

For the 265cu, 225hp and the 240hp, this is a 3 bolt exhaust, the number is 3731762

 

Carburetors

The identification number will be found on a triangular metal tag attached to the air horn. There will also be a manufacture date code. It will appear with a letter, A-M, (I was not used), signifying the month followed by the last digit of the year of manufacture. This was followed by a number of the assembly line.

220 hp, All - Carter WCFB 2366SA - 3733246

225 hp, front - Carter WCFB 2419S - 3730599

rear - WCFB 2362S - 3720953

 

Transmissions

Located by a stamp located on the rear face of the case in the lower right corner. The C is for the Cleveland Plant. There would be 1 or 2 digits for the month of production, (January through December). There may be a suffix of D or N (for day or night shift). Note; for six-cylinder Powerglide Transmissions, there may be a VC as a prefix for a Powerglide instead of the C. (The VC is the Chevrolet code for Corvette Cleveland Transmission.)

 

Starter Motors

The identification number is stamped on to a Delco-Remy tag. The tag is riveted to the starter motor housing.

1107627 All engines.

 

Generators and Alternators

A red tag that has been riveted to the housing will have the serial number, which is a date code. Date coding for this year is 6 followed by the month code (A-M, no I was used) and the day 1-31.

1102043 30 Amps - All engines.

 

Ignition Distributors

1110872 Early Engines

1110879 Late Engines

 

Ignition Coils

1115091 All Carbureted Engines

1115107 All Fuel Injected Engines

 

Radiators

Corvette radiators were manufactured by the Harrison Division of GM in Lockport, New York. This radiator has a Harrison Division identification tag soldered to the center, inlet side, of the upper core tank. The tag has the part number and a date code of the year and a letter A-L.

3133689 Copper - All Engines

 

Colors

Exterior

Quantity

Soft Top

Wheels

Interior

Onyx Black

810

White/Black

Black

Red

Aztec Copper

402

Beige/White

Copper

Beige

Cascade Green

290

Beige/White

Green

Beige

Arctic Blue

390

Beige/White

Blue

Beige/Red

Venetian Red

1,043

Beige/White

Red

Red

Polo White

532

Black/White

Red

Red

The cushion and backrest were a waffle pattern vinyl. The bolsters were a leather grain vinyl. The upper instrument panel matched the exterior color on all Corvettes except the Polo White as it was red The lower instrument panel, steering column, directional signal housing, steering wheel hub and plastic side panel was red on the Onyx Black Corvette and was White in the Polo White Corvette. All others were Beige for all of the other Corvette exterior colors. The Steering Wheel was Beige on the copper, green, and blue Corvette and was Red for all of the other Corvette exteriors.

 

Price and Production

Code

Description

Quantity

Price

2934

Base Corvette Convertible

3,467

$3,467.00

101

Heater

Unknown

123.65

102

AM Radio

2,717

198.90

107

Parking Brake Alarm

2,685

5.40

108

Courtesy Lights

2,775

8.65

109

Windshield Washers

2,815

11.85

290

Whitewall Tries

Unknown

32.30

313

Powerglide Transmission

Unknown

188.50

419

Auxiliary Hardtop

2,076

215.20

426

Power Windows

547

64.60

440

Two Tone Paint

1,259

19.40

449

Hi-Lift Camshaft

111

188.30

469

265ci 225hp Engine 2 4Bbl Carbs.

3,080

172.20

471

Rear Axle 3.27 Ratio

Unknown

0.00

473

Power Operated Folding Top

2,682

107.60

 

Glass

Libby-Owens-Ford Glass Date Codes V is the code for 1956 and would be the 2nd letter in the code. The month code is below. As an example if the code on the glass was JV the glass was manufactured in May 1956. It is possible that GM used glass from other manufacturers, however, it would not be likely, (according to the NCRS Pocket Spec Guide) . Safety Plate glass was used for all of the windows. There will also be the American Standard specification code AS1 for windshields and the code AS2 for the rest of the glass.

Month

Year

Code

January

1953 to 1956

L

January

1957 to 1972

N

February

1953 to 1957

M

February

1958 to 1972

X

March

1953 to 1956

N

March

1957 to 1972

L

April

1953 to 19567

K

April

1958 to 1972

G

May

1953 to 1972

J

June

1953 to 1972

I

July

1953 to 1957

H

July

1958 to 1972

U

August

1953 to 1972

T

September

1953 to 1957

E

Septembe

1958 to 1972

A

October

1953 to 1957

F

October

1958 to 1972

Y

November

1953 to 1972

C

December

1953 to 1972

V