Three 1986 Grand Prix models continued including base, LE and Brougham. Engine offerings again included the standard Buick 3.8 L V6, the Chevrolet 4.3 L V6 or optional Chevrolet 5.0 L V8. An updated taillight design with three sections was the only major change to the 1986 Grand Prix.  A new 2+2 model was offered for homologation of an aerodynamic … Continue reading 1986 Pontiac Grand Prix Manufacturer Promo