1977 Corvette Identification Numbers

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Below is a listing of common identification numbers for the 1977 Corvette including engine block, head id, casting numbers and more.

Vehicle Identification Number
1Z37L7S400001 - 1Z37L7S449213
Digit	Definition
1st	1 = GM Division = Chevrolet
2nd	Z = Series = Corvette
3rd/4th	Body Style:  37 = Coupe
5th	Engine Type:  L = L48, X = L82
6th	7 = Model Year = 1977
7th	Assembly Plant:  S = St. Louis, MO.
Last 6 digits	Production Number starting with 400001 and up.

Body Time Built Codes
A	August	E	December	I	April
B	September	F	January	J	May
C	October	G	February	K	June
D	November	H	March	L	July
				M	August - '77

Engine Suffix ID Numbers
CHD:	350ci, 180hp, (automatic transmission, California emissions)
CKD:	350ci, 180hp, (automatic transmission, high altitude use)
CKZ:	350ci, 180hp (manual transmission)
CLA:	350ci, 180hp (automatic transmission)
CLB:	350ci, 180hp (automatic transmission, high altitude use)
CLC:	350ci, 180hp (automatic transmission, California emissions)
CLD:	350ci, 210hp (manual transmission)
CLF:	350ci, 210hp (automatic transmission)

Block ID Numbers
3970010:	All Engines

Head ID Numbers
333882:	All Engines

Carburetor ID Numbers
Rochester Q-jet #17057202:	350ci, 180hp (automatic transmission)
Rochester Q-jet #17057203:	350ci, 180hp (manual transmission)
Rochester Q-jet #17057204:	350ci, 180hp (air conditioning, automatic transmission)
Rochester Q-jet #17057210:	350ci, 210hp (automatic transmission)
Rochester Q-jet #17057211:	350ci, 210hp (manual transmission)
Rochester Q-jet #17057228:	350ci, 210hp (air conditioning, automatic transmission)
Rochester Q-jet #17057502:	350ci, 180hp (automatic transmission, California emissions)
Rochester Q-jet #17057504:	350ci, 180hp (air conditioning, automatic transmission, California emissions)
Rochester Q-jet #17057510:	350ci, 210hp (automatic transmission, unknown use)
Rochester Q-jet #17057582:	350ci, 180hp (automatic transmission, high altitude use)
Rochester Q-jet #17057584:	350ci, 180hp (air conditioning, automatic transmission, high altitude use)

Alternator ID Numbers
1102474:	All engines equipped with air conditioning and early production models.
1102484:	All engines equipped without air conditioning.
1102908:	All engines equipped with air conditioning or rear defogger.
1102909:	All engines equipped without air conditioning or rear defogger.

Distributor ID Numbers
1103200:	350ci, 210hp (manual transmission)
1103246:	350ci, 180hp
1103248:	350ci, 180hp (automatic transmission, California emissions)
1103256:	350ci, 210hp

Identification
Exterior: This is the first year that the Stingray moniker was not used. The earliest 1977 Corvettes came with the alarm key hole on the left front fender and lacked fender emblems. This changed during production. The update included the loss of the alarm key hold and a new crossed flags emblem. The crossed flags emblem used on the fenders, front-end and fuel filler door is new for this model year and used on 1977-1979 Corvettes. (see below) The exterior luggage rack became an official option (RPO V54) and was a dealer installed option prior to the 1977 model year.
Interior: Instrument cluster gauges were redesigned. Center console, steering column and steering wheel were redesigned. The redesigned steering wheel came only with the Tilt-Telescopic Steering Column option (RPO N37). Headlight dimmer switch and windshield wiper controls were moved to two separate stalks on the left hand side of the steering column.
Emblems and Identification Methods:
	Hood Emblem: Model Years:  1977 - 1979 Corvette
	Emblem - Fuel Filler Door (Front View): Model Years:  1977 Corvette
	Emblem - Fuel Filler Door (Rear View): Model Years:  1977
	Trim Tag: Description:  This contains factory ordered color and trim options. Location:  The Trim Tag is located on the driver's door jamb below the windshield pillar post.