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Got my oil changed a couple hundred miles before it was due, and about 2 weeks later a digital "Change Oil" message came up on my odometer. It goes away when I hit the trip reset, but comes back every time I start the truck. How do I reset that irritating little message?
Temp gauge looks normal, and heat blows when car is moving. Coolant level is good. Looking for the thermostat I found a weird piece on top of engine called a coolant outlet housing, has a bleeder valve on top. Tried to bleed air from coolant/ heater core lines, but the valve just spins in its fitting. Replace? Or is it more likely to be a blocked heater core, or bad thermostat? And that thermostat is a HUGE pain to get to.