1975 - 1976 Corvette: Service News: 1975 Model Lock Sets in 1976 Vehicles
If you own an early 1976 Corvette, it's possible that your Corvette left the St. Louis Corvette Factory with a 1975 code lock and key set.
Subject: 1975 Model Lock Sets in 1976 Vehicles
Model and Year: 1976 Models
Source: Chevrolet Service News
Page Number: NA
Date: January/February 1976 - Volume 48 - Number 1
Some 1976 models are equipped with 1975 lock sets. the 1975 and 1976 lock sets can be easily identified by the code letter stamped in the key shank (Fig. 2).
The following list identifies 1975 and 1976 key blanks, letter designations, and key codes.
When additional key sets are requested by the customer, it is imperative to check the key identification letter and/or key code (in knock out blank) to determine model year key set used and key blank required.