Inside of weeks from the 1971 products' debut, nevertheless, Oldsmobile—and all other GM sellers—acquired multiple problems from motorists who complained the air flow process pulled cold air into the motor vehicle before the heater could heat up—and could not be shut off. The ventilation method was thoroughly revised for 1972. https://mancur-8881458.wizzardsblog.com/30747982/considerations-to-know-about-mancur-88