Will a blown head gasket cause your engine to overheat on 1991 Chevy Corsica?

Yes, a blown head gasket on a 1991 Chevy Corsica (or any car, for that matter) can absolutely cause the engine to overheat. A head gasket seals the combustion chambers from the coolant passages. If it's blown, coolant can leak into the cylinders or vice-versa, preventing proper cooling and leading to overheating. It's a common cause of overheating.