Temperature Problems

[2KJimmySLS]

My temperature guage is reading lower than it usually does (which is about one tick below 1/2). It's been at about 1 tick above 1/4 of the way for about a week (on one occasion it was at the normal level). I'm thinking the thermostat on that, but one thing I noticed was that the coolant in the reservoir tank is lower than it usually is; it doesn't seem to be losing any coolant because it has stayed at the same spot, its just low. Is there a correlation between the thermostat and low coolant in the reservoir? I need to check the radiator still, so I can say more about levels at that point. Oh yes, and the heat seems to be running fine.

I guess my question is, is there something else I need to keep an eye on if the coolant level continues to drop? (e.g. head gasket, intake gasket, etc. I just changed my oil last night and saw nothing unusual).

[inafogg]

hello jimmy it could be your thermostat.in that its stuck open.your cars make year miles maybe helpful

[2KJimmySLS]

Sorry, its a 2000 Jimmy 2dr, 4wd with 91,000 miles. Got it at 83,000.