I dont have a buick GN anymore but I have a Buick GN motor that I just Installed in my 1990 Chevy Silverado Single cab short bed.. Dont worry didnt kill a GN to do it which I always said if i could find a motor already out of a car Id do it... and well I got the find of my lifetime an Unnumbered Buick GN motor that was a Factory Test motor for Delco Here in Kokomo so the Motor and Tranny has never known anything other than being installed in my truck... Got all the Engineers paperwork a Data Prom computer from Delco and a Stock computer Plus wiring harness and everything