2001 Chevy silverado overheating
Is radiator fan coming on ? If so could be a clogged radiator or clogged passages in the cooling system in the engine. You can try a good cooling system flush like Prestone Super Flush. Depending on how clogged the radiator is it may need to be replaced.
Search Chevrolet C/K 1500 Questions
Chevrolet C/K 1500 Experts