One problem related to engine and engine cooling has been reported for the 1998 Buick Park Avenue. The most recently reported issues are listed below.
On may 6, 2006 we were coming back to spartanburg, SC from the beach. We were about 7 miles from kingsree, SC. After leaving a service station, we started getting "check engine" messages. We went back to the service station to see what was wrong. We had no coolant. I put a gallon of coolant in and decided to go into kingstree, SC in case there was more trouble. Just as we got to kingstree, SC we stopped at another station after getting more "check engine" messages. Again, we were out of coolant and now the car would not start. A wrecker towed it to a garage. The mechanic said he was fairly certain of what the problem was because Buick had been having lots of trouble with a particular part. He then confirmed that it was the upper intake. He replaced the upper intake part with a revised part from Buick and assured us we would not have any more trouble with the coolant. This cost $571. 48 and a 6 hour delay. The consequences could have been much more serious if we had not been near a service station. Buick refuses to pay or acknowledge they have a problem with the intake.