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**mikey531** · 03-12-2017, 09:17 AM

My 2000 GMC with 158,000 sits in the garage a lot. I started using it just to get it limbered up a little. It runs fine no issues other engine rap on startup. The temperature gauge always shows a little under 210 but in the last week it was at 185. I was getting plenty of heat and the temp would go up a bit when I turned off the heater blower. I am thinking either the fan is staying on or the thermostat is stuck open. However I am open to any other ideas too. Thanks!

03-12-2017, 09:17 AM	#1
mikey531 Senior Member Join Date: Jul 2009 Location: Exeter, NH Posts: 775	2000 GMC Sierra 4X4 My 2000 GMC with 158,000 sits in the garage a lot. I started using it just to get it limbered up a little. It runs fine no issues other engine rap on startup. The temperature gauge always shows a little under 210 but in the last week it was at 185. I was getting plenty of heat and the temp would go up a bit when I turned off the heater blower. I am thinking either the fan is staying on or the thermostat is stuck open. However I am open to any other ideas too. Thanks!