grumpyvette Administrator Staff member Jan 2, 2010 #1 For the 1990 and 1991 Corvette, the modules are Module "1", the CCM Module "4", the ECM http://www.corvettebuyers.com/c4vettes/codes.htm
For the 1990 and 1991 Corvette, the modules are Module "1", the CCM Module "4", the ECM http://www.corvettebuyers.com/c4vettes/codes.htm