what is the temp stamped on the GM thermostat

[Enderbygrandpa]

just wondering if anybody has ever checked what is stamped in the GM thermostat? I got a Stant and it was Stamped 86C (186.8F) their catalog lists it at 190F Just wondering if GM playing around the same way. I would think Gates would be same as Stant same company. I havent found any other brands that list for our trucks 4.2

 

[Mark20]

Got my original in hand and other than GM's number the manufacturer (I assume) BETR none of the other numbers look like a temperature. There is a D488S2E stamp on the cup that hold the expanding pellet. If the 88 means 88C then that's pretty close to 190F but I doubt it means that. Interestingly GM's number ends in 88.

 

[Enderbygrandpa]

my original has C3 88 S2E stamped manufactured date 042203 so I think maybe the 88 is the temperature. so much for all the other temps reported like 192 and 195

 

[Mark20]

Got unlazy and fired up a C to F calculator, 88C is 190.4F. Maybe the 88 does mean the temperature.

Probably the best thing is to just get the OEM T-stat and you'll be good to go.