The booklet that comes with it has a list of codes, their descriptions, and how to start collect the codes from the ECU. However, any GM car repair manual will/should have the same list. It is cheap, and it does what I need it to do. ... The first code I observed when I first used the GM Code Reader on my 1991 Chevrolet S10 Blazer SUV was the infamous Code 32, a EGR system malfunction. It apparently was a false code or a temporary code because I did not do or replace ...
