Bad cooling fan or thermal relay. Bad water pump, clogged radiator.
Cracked.head
A car running hot after it has been started could be blown head gaskets. The thermostat may also need to be replaced.
Is you Geo Tracker overheating or the temperature is running almost hot then you need to change you thermostat
The thermostat is stuck open and needs to be replaced.
Check the engine thermostat.
Had this happen once. Found out the thermostat was'nt opening. Replaced it and everything worked fine. Watch your heat gauge, if after a few minutes of the engine running and the gauge goes from nothing to hot imediatly instead of gradully, you;ve probably got a bad thermostat.
It could be that you are low on coolant, but if that is not the case, your thermostat may be stuck open. After the vehicle has been running for about 15 minutes, put your hand on the top of the radiator. If it is not too hot to touch, your thermostat should probably be replaced.
Yes your thermostat is working if it is drawing coolant after about ten minutes. It depends on the size of your motor to determine how long it should take to hit the right temp for the thermostat to open up so it can send coolant through the system. If it starts within ten minutes your thermostat is working fine
Thermostat needs to be replaced, it is not opening (most common). Is electric fan on radiator running normally from time to time?
Perhaps plugged radiator - have it boiled out or replaced
Could be your electric fan on the radiator is shot, or the relay is bad.
Just had this problem. I replaced the oxygen sensor and it appears to be running fine.