Hello everyone! My girlfriend has a 2004 Impala. It has about 75,000 miles on it. A couple days ago she noticed that when she had the heat running it would go from warm to cold, never getting hot like it used to (keep in mind it is September). She also notices that when she is stopped and idling, the temp jumps up more that she has seen before. I checked the coolant level and it is fine, no idiot low coolant lights either. I do not see any sort of leak near the water pump or around any hoses. She is taking it to the dealership on Monday and I was wondering if anyone here could give me some guidance as far as what else it could be. Please correct me if I'm wrong here, but, I told her that it could be one or more of the following:
1) cooling system needs to be flushed, could have air in system (She had this done at...LOL...Sears at about 50,000 miles)
2) bad thermostat
3) leaking coolant (cannot locate any leak myself)
4) bad heater core (I think they usually leak if they go bad)
5) bad water pump (cannot see any leaks while engine is running)
Any advice would be greatly appreciated.
Thanks,
James
1) cooling system needs to be flushed, could have air in system (She had this done at...LOL...Sears at about 50,000 miles)
2) bad thermostat
3) leaking coolant (cannot locate any leak myself)
4) bad heater core (I think they usually leak if they go bad)
5) bad water pump (cannot see any leaks while engine is running)
Any advice would be greatly appreciated.
Thanks,
James