Great information. Old sensor for my jeep not made at all. GM sensor will work looking at specs. Found that the GM sensors listed here are actually available in 1/2 inch or 3/8 inch (I needed 3/8 and first one I ordered of course was 1/2) BTW, the old sensor can be restored with a $2 NTC (resistance goes up as temp goes down) radial lead thermistor. Just need to get guard off old sensor and solder new piece in. Works fine.