General Motors is offering savings and incentives on eligible Chevrolet, Buick or GMC vehicles. This is available to active duty members, reservists and retirees serving in the U.S. Army, Navy, Air Force, Marine Corps, National Guard and Coast Guard as well as their spouses. Veterans within one year of discharge date are also eligible for this benefit. For more details, see this GM information page.
Overheating is signaled by the temperature gauge reaching red or the "Check Engine" or "Temperature" malfunction lights appearing.
The radiator is designed to cool the liquid quickly by passing it over a large cooling surface.
A fresh supply of air doesn't move through the radiator fins when a vehicle is standing still or crawling through heavy traffic.