1975 Corvette Identification Numbers

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Below is a listing of common identification numbers for the 1975 Corvette including engine block, head id, casting numbers and more.

Vehicle Identification Number
1Z37J5S400001 - 1Z37J5S438465
Digit	Definition
1st	1 = GM Division = Chevrolet
2nd	Z = Series = Corvette
3rd/4th	Body Style:  37 = Coupe, 67 = Convert
5th	Engine Type:  J = L48, T = L82
6th	5 = Model Year = 1975
7th	Assembly Plant:  S = St. Louis, MO.
Last 6 digits	Production Number starting with 400001 and up.

1975 Corvette Production Codes and Dates

A:  October	B:  November
C:  December	D:  January
E:  February	F:  March
G:  April	H:  May
I:  June	J:  July

The Corvette tooling changeover period for the 1976 model year was August 8, 1975 through August 18, 1975.

Ending Vehicle Serial Numbers:

October 1974:  02385 (33347)	November 1974:  06180
December 1974:  09190	January 1975:  13159
February 1975:  17112	March 1975:  20856
April 1975:  25228	May 1975:  29379
June 1975:  33474	July 1975:  38465

Source:  Birthplace of Legends - The Story of Corvette production at the St. Louis Assembly Plant 1953-1981 - Peter J. Licastro

Engine Suffix ID Numbers
CHA:	350ci, 165hp, (manual transmission)
CHB:	350ci, 165hp, (automatic transmission)
CHC:	350ci, 205hp, (manual transmission)
CHR:	350ci, 205hp, (automatic transmission, California emissions)
CHU:	350ci, 165hp, (manual transmission)
CHZ:	350ci, 165hp, (automatic transmission, California emissions)
CKC:	350ci, 205hp, (automatic transmission)
CRJ:	350ci, 165hp (manual transmission)
CRK:	350ci, 165hp (automatic transmission)
CRL:	350ci, 205hp (manual transmission)
CRM:	350ci, 205hp, (automatic transmission)
CUA:	350ci, 165hp, (manual transmission)
CUB:	350ci, 165hp (manual transmission)
CUD:	350ci, 205hp (manual transmission)
CUT:	350ci, 205hp (manual transmission)

Block ID Numbers
3970010:	All Engines

Head ID Numbers
333882:	All Engines

Carburetor ID Numbers
Rochester Q-jet #7045210:	350ci, 205hp (automatic transmission)
Rochester Q-jet #7045211:	350ci, 205hp (manual transmission)
Rochester Q-jet #7045222:	350ci, 165hp (automatic transmission)
Rochester Q-jet #7045223:	350ci, 165hp (manual transmission)

Distributor ID Numbers
1112880:	350ci, 165hp (California emissions)
1112883:	350ci, 205hp
1112888:	350ci, 165hp
1112979:	350ci, 205hp (second design)

Alternator ID Numbers
1100544:	All with air conditioning.
1100950:	All without air conditioning.
1102474:	With air conditioning and late production date.
1102484:	Without air conditioning and late production date.