ACDelco GM Original Equipment Cab Air Temperature Sensor Aspirators are part of the interior cabin temperature sensing feature and are GM-recommended replacements for your vehicle’s original components. The cab air temperature sensor aspirator may have a small fan, depending on application, to draw cabin air across the interior temperature sensor. These original equipment cab air temperature sensor aspirators have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.