Your question is REALLY vague. There are a number of gaskets on a car ,so you need to be very specific. Is it a head gasket,valve cover gasket,water pump gasket etc....
How do I change the head gasket on a 1995 Park Avenue. and what are the specs.
Depends on the engine the Park Avenue had in it.
The cost to replace a head gasket in a 1997 Buick Park Avenue ranges from $20 to $180+. This varies based on brand, store and labor costs.
The PCV valve on a 1995 Buick Park Avenue is located on the top of the valve cover. Twist the valve and pull to remove and replace it.
1000lbs
The oil filter on the 1995 Buick Park Avenue is located on the driver's side in the engine compartment. The filter is close to the firewall on the driver's side.
The Buick Park Avenue Started In 1991
in the top of the fuel tank...
3536 pounds per : http://consumerguideauto.howstuffworks.com/1991-to-1996-buick-park-avenue-6.htm
By disassembling the engine. Not a DIY job.
Pull the bulb...
It is located inside front cover of engine.