Female 2 pin plug, pull to seat. These are high quality reproduction connectors to suit OEM sensors.
Also cross references with Part Numbers HT-030411, CPS-012 & Delphi Delco GM 88862305
Suits CTS-038, Delco GM 12608814, GM 09275979, Bosch 0280130023, Haltech HT010300 & HT010302 coolant temperature sensors