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International Automotive Technicians Network
Re: GM Thermostat Question
Posted to Technical Discussion Forum on 1/6/2016

usually the tstat with seal does not need any additional gasket, clean the recess where the seal goes and you should be good to go, also use a bit of thread seal on the bolts if they go into coolant.

Howard Hong
Technician
Howard Hong
Yuba City, California, USA