HOW TO DISTINGUISH IF ITS A HEAD GASKET ISSUE , TRANSMISSION ISSUE , or BOTH?
You can perform a cylinder compression and or leak down test on the engine to determine if you have a head gasket issue. Are you losing coolant? How is your transmission fluid? Is the coolant pink?
Search Buick Park Avenue Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Buick Park Avenue Experts