Question about 2004 Chevrolet Impala

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Over heating 2004 chevy impala "hot coolant" light comes on & it overheats. replaced thermostat and added anit-freeze. still doing it. not every time, also when it does it the heater blows cold air. it is not loosing coolant. about a year ago the water pump and thermostat were replaced. help

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  • Anonymous Mar 23, 2014

    coolant fluid level warning light on. fault traced to faulty thermostat/heater. how easy is this to replace. any help would be appreciated, Jim.

  • Anonymous Mar 23, 2014

    the thermostat might be stuck. Not running hot. Just not heating my car fast

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Sounds like an air pocket or waterpump may be on way out.

Posted on Jan 03, 2009

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1 Answer

2007 chevy impala, the hot are take a long time to heat up


that's a possibility. Typically if the thermostat is stuck open on newer vehicles the check engine light will come on and have a P0128 code for low coolant temperature.

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2000 chevy impala overheats i think its something electric


I doubt its anything electric.
Are you sure the radiator is full of coolant ?
Do both radiator hoses get hot when the thermostat opens at 195 degrees ?
Do both heater hoses get hot after running the engine for 5 min ?

Feb 06, 2013 | 2000 Chevrolet Impala

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2003 impala heater quits working sometimes and it overheats sometimes


You should have it checked out right away, before the overheating does any damage to the engine. The whole coolant system should be inspected to find the cause. It may be a simple fix, maybe not. Are you adding coolant constantly? Do your radiator fans come on when it starts to overheat?
When it gets too hot, it may be boiling coolant away, and the low coolant level will cause the heater to stop putting out heat.

Feb 17, 2012 | 2003 Chevrolet Impala

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I have a 2003 chevy Impala. The hot coolant light keeps coming on and temp gauge goes up. We have changed the thermostat replace the gaskets. Has new radiator and new fan. NOthing has helped. Dont know...


It could be a blown head gasket. Check for water bubbles on the oil dipstick, and for oil in the radiator. Also, get rid of all that water in the radiator. and replace it with a quality anti- freeze / anti-boil solution. Then have a good tune-up. Check and replace , if needed, the spark plugs. Ensure that the gap is right. Same/same for points. Then check the timing. Those things should get you going again. Please don't forget to rate this answer.

Nov 26, 2011 | 2004 Chevrolet Impala

1 Answer

My 2003 Chevy Impala is losing power and today the temp. gauge read hot. The car didn't overheat but smelled hot. I had the head gasket and valves replaced about 2 yrs. ago. Could this be the catalytic...


"The car didn't overheat" you may have a blown head gasket, also if it sustained heat for a prolonged time , the head may have warped. Check coolant level.

Sep 23, 2011 | 2003 Chevrolet Impala

1 Answer

There is no heat blowing out when the heater is turned on.. WOuld replacing the thermostat solve this problem?


it should work. but be sure to bleed air out of system when adding coolant, or it will not get hot.

Oct 07, 2010 | 2004 Chevrolet Impala

2 Answers

Have antifreeze leaking in front of car by the front wheels. Smells like antifreeze burning. why?


The anti-freeze smells like it burning because it is coming in contact with your brake pads (will contaminate pads and reduce life and increase stopping distance, exhaust system (most likely cause of burning smell), or some other hot spot on the the engine.

You should resolve this as it will cause over heating as the system can not properly pressurize and reduced coolant level.

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Would the heater control valve malfunctioning make the engine overheat blowing hot air out the heater one moment,then not blowing the hot air, temp gage spikes 225 plus. The motor takes awhile to heat up...


Heater control valve malfunction will not cause engine to overheat unless coolant is leaking externally...Overheating going down the road can be the result of a few different things...Partly clogged radiator...Insufficient air flow due to possible fan problem...External coolant leak...Make sure fans are operting properly and have cooling system pressure tested for leaks...Gaining and losing heat on the inside of the vehicle usually means system is low on coolant but you must find out where coolant is going

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2004 Chevy Impala no heat from defrost or heater


No heat is often a symptom of low coolant, usually followed by overheat. There are other controls that regulate heater, but right now, re-fill the cooling system with engine running and heater on high, then check for leaks (coolant you lost went somewhere...you need to determine where) Low coolant will damage your engine. Take care of that first, then if heater still does not work, then do diagnosis on that. (if you loose the engine heat won't matter, will it!)

Sep 22, 2009 | 2004 Chevrolet Impala

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