Where is the starter located on a 1989 Buick Park Avenue?
In front of the engine, below the exhaust manifold. You will find it nestled between the motor and transmission..
For model year 1989 General Motors did not produce the Buick Park Avenue. The soonest production date to 1989 was the 1991 Park Avenue. The 1991 Park Avenue was offered in 3800 engine in supercharged or naturally aspirated. The part numbers for electronic control module (ECM) or "computer" will vary based on the exact engine for model year 1991s.
I recently bought a 92 Buick Park Ave, with one that didn't work. He told me he inquired about fixing it, contacted a dealer, they said only a licensed Buick dealer can do that, and it costs about $300. I haven't checked myself, but the person I bought the car from is my friend, so I doubt its not true.