A bad camshaft can cause your engine to idle high and overheat. A fuel injector pump that needs to be adjusted can also cause the same problems.
your electric radiator fan might not be working,check fan fuses
The idle arm may be off set. The idling is set extremely high according to the RPM's stated and need to be lowered.
possible radiator resrtiction
Until it overheats, runs out of oil or gas, or has a mechanical failure.
how to adjust idle on 2001 legacy
Why does my 2001 kia sportage idle rough?
Thermostat regulator is malfunctioning, water pump pulley could be bad, gas bubble in radiator hose.
On a 2001 Chevy Lumina with a V6 engine, the high-speed idle control is typically managed by the throttle body assembly. The idle air control (IAC) valve, located on the throttle body, regulates airflow and adjusts the engine's idle speed. You can find the throttle body on the intake manifold, near the front of the engine, connected to the air intake system.
The idle is computer controlled
check your fluids it is probably low on antifreeze and if it still does it change your thermostat that should fix the problem
How high is your idle? idle should be 800rpm good oil pressure is obtained at this idle
The idle on a 2001 24 valve is computer controlled and is not adjustable.