http://www.troublecodes.net/GM/94-95_65.shtml

I added this to a post earlier but I think the addition codes should be added or a link offered. Just trying to help.

We have a DTC look up tool. It's in the FAQ's, and in my signature line, built in to our forum. Sometime it might make it onto the tool bar up top.

I tried your lookup but did not include my 91 code. Your list went up in the 70s and the list I provided goes up to 98 I believe.

Ah... haven't done a "90's" code... I've just always chocked them up to being clyinder imbalance, spare one or two of them... I'll see if we can check into that. Thanks!