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depends on who fixes it. you do it about 200.00 for all the gaskets.shop labor is about 75.00 an hour. it takes about 5 or 6 hours. do the math
You don't
the frost plugs are in the block and head. if you have a block heater follow the cord to the block heater, it replaces a frost plug. that should give you an idea where they should be located
You have a bad or missing ground.
bad head or head gasket
It's between the engine block and the cylinder head.
take it to a pro
No. You need to remove the head(s) and have the head(s) checked for cracks and straightness, then install the head(s) with new head gaskets. Most head gasket manufactured are assembled dry, no sealants.
The 1999 Pontiac cylinder head gasket bolt torque specification is 160 pounds. The intake manifold bolt torque specification is 90 pounds.
1200 $ for a new head and instalation
Could be a bad head gasket.
it will cost you 200 dollar if do it yourself