'93 GP 3.1 T Head gaskets

What is GM's recommendation for replacing Head gaskets? are you suppose to use some kind of coating or not?
Thanks

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install clean and dry. cleaning the surfaces is very important. final step i wipe down with laquer thinner to remove all oil. its also important to be sure the head is flat.if not,youll blow that new gasket.
http://www.minibite.com/america/malone.htm
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