GM Closed Element CLT or IAT Sensor with 6' Pigtail by DIYAutoTune Suitable for use as a Coolant Temperature Sensor (CLT) on all vehicles Or as an Intake Air Temp Sensor (IAT) on naturally aspirated vehicles. Proper GM-style sensors for use with the MegaSquirt line of ECUs include a 6" wire pig-tail with weatherproof connector Threads are 3/8 NPT