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Does a 2004 Chevy Monte Carlo LS require fuel injectors or sparkplugs for tune up?

A 2004 Chevy Monte Carlo LS requires both fuel injectors and spark plugs as part of a comprehensive tune-up. While spark plugs are a standard tune-up item, fuel injectors aren't typically *replaced* during a routine tune-up unless they're showing signs of failure. Cleaning them might be part of a more extensive service.