Re: 1999 350 vortec K1500 head gasket
Those Vortec 350's are known for intake gasket issues, mostly due to dexcool. Felpro has a revised updated gasket for the application.
That intake gasket separates coolant and oil from air/fuel. I would first replace the intake gasket and go from there.
If your not satisfied after that, do a compression test on all cylinders (for comparative figures) and the coolant test strips.
Cheers ~Mykk
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