CountyLineGarage
Newbie
I’ve got a 95 Sierra I just replaced manifold gaskets on. I also replaced the thermostat just cause they’re cheap and why not... I bled the system of air a few times though I’m confident the first time worked as no air came out after that I just wanted to be sure. But, (there’s always a but) for whatever reason after initial start up say in the morning or after work it wants to overheat once getting up to temperature and shooting way past into the ”check gauges” territory. So I shut it off and pull over wait a few minutes maybe a bit less and start it up again and bam instantly shoots back to below 210. (It’s a 195 thermostat). Any suggestions. Don’t think it’s a head gasket as it’s a pretty fresh rebuild.