One problem related to crankcase (pcv) has been reported for the 1999 Buick Park Avenue. The most recently reported issues are listed below.
1999 Buick park Ave v6=3800 3 8l shot fire apx. 6 feet per firemen on duty that witnessed this. The motor shook. Upper intake, intake set, valve cover set, pcv, oil pressure switch, both converters and still not fixed.