1977 Corvette: Service Bulletin: Rear Axle Identification Revision
Subject: Rear Axle Identification Revision
Model and Year: 1977 Passenger Car
Source: Chevrolet Dealer Service Information Bulletin
Bulletin No: 77-I-21
Date: March, 1977
TO: ALL CHEVROLET DEALERS
This bulletin is being issued to update 77-I-1, 1977 Passenger Car and Light Truck Identification Information, relative to passenger car rear axle identification found on page 14 of the bulletin published in September of 1976.
Due to changes in many axle codes, this page should be inserted in the previous bulletin in the proper place.
All axle code additions and changes are effective February 1, 1977.
Chevrolet Motor Division
General Motors Corporation