How to determine the month and year your C3 Corvette was built You can determine the date your C3 Corvette was built by looking at the codes on the "Trim Tag" on your Vette. The Trim tag is located on the driver side "A" pillar, just outside of the dash area. You can see it when you open the door. It contains info for the build date, interior trim color codes, and external paint codes. Take a look at the example below, then find your model year in the list below the example to find code definitions for your model year.  The letter is the month and the number is the day of the month it was built. Example Trim Tag from a 1969 Vette Click the model year you are searching for: 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982   1968: A August 1967 B September C October D November E December F January 1968 G February H March I April J May K June L July M August 1968 1969: Note: The 1969 model year ran long, due to a Labor strike. A August 1968 B September C October D November E December F January 1969 G February H March I April J May K June L July M August N September O October P November Q December 1969 1970: Note: The 1970 model year was short, due to the labor strike in 1969. A January 1970 B February C March D April E May F June G July 1970 1971: A August 1970 B September C October D November E December F January 1971 G February H March I April J May K June L July 1971 1972: A August 1971 B September C October D November E December F January 1972 G February H March I April J May K June L July 1972 1973: A August 1972 B September C October D November E December F January 1973 G February H March I April J May (4000 VIN plates missing: VIN #s from 24,001 to 28,000 do not exist! K June L July 1973 1974: Note: There were NO Corvettes built from approx. June 28 to Sept.2. 1974 A August 1973 B September C October D November E December F January 1974 G February H March I April J May K June L July M August N September 1974 1975: A October 1974 B November C December D January 1975 E February F March G April H May I June J July 1975 1976: A August 1975 B September C October D November E December F January 1976 G February H March I April J May K June L July M August 1976 1977: A August 1976 B September C October D November E December F January 1977 G February H March I April J May K June L July M August 1977 1978: A September 1977 B October C November D December E January 1978 F February G March H April I May J June K July L August 1978 1979: A August 1978 B September C October D November E December F January 1979 G February H March I April J May K June L July M August N September 1979 1980: A October 1979 B November C December D January 1980 E February F March G April H May I June J July K August 1980 1981: St. Louis built cars: A August 1980 B September C October D November E December F January 1981 G February H March I April J May K June L July 1981 For the '81-'82 Bowling Green cars ONLY, there is a letter following the last number in the date code. This letter represents the week of the month, ie: A= 1st week, B= second week, etc. 1981: Bowling Green built cars: B05 May 1981 B06 June B07 July B08 August B09 September B10 October 1981 For the '81-'82 Bowling Green cars ONLY, there is a letter following the last number in the date code. This letter represents the week of the month, ie: A= 1st week, B= second week, etc. 1982: C10 October 1981 C11 November C12 December C01 January 1982 C02 February C03 March C04 April C05 May C06 June C07 July C08 August C09 September C10 October 1982