Removal Procedure

Remove the radiator grille from the vehicle. Refer to GRILLE REPLACEMENT (OLD STYLE) or GRILLE REPLACEMENT (NEW STYLE GMC) or GRILLE REPLACEMENT (NEW STYLE CHEVROLET) .
Remove the push pin retainer from the sensor mounted on the radiator support brace.
Disconnect the electrical connector from the sensor.

Fig 1: Removing Ambient Air Temperature Sensor
Courtesy of GENERAL MOTORS CORP.