The transmission was weak in those, 4L30 if I remember correctly. Not everyone took care of them and serviced them regularly. I would ask for service records. However they were also used in a lot of different vehicles. I had a 95, if the coil packs are at the front of the engine it's a single overhead cam. If coil packs are on the back its duel overhead cam with extra 15?? horse power. Lots of GM parts in it, coils are the same as on the impala.