1990 Chevrolet G Series Van (G20) Questions

Unanswered 1990 Chevrolet G Series Van (G20) Questions

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what is the differance in an intakemanifold gasket for a 1990 chevy G20 4.3l engine? the gasket we pulled off had 10 rectangle openings where 4 were closed off. The gaskets that we bought had 10 openings with 2 closed...
I am looking for information on how to properly change the heater control valve.....please help