Q: 2005 Chevy impala keeps overheating coolant reservoir full no visible smoke or no check engine light could it be the thermostat?

asked by on December 21, 2017

My car is overheating the check engine light is not on when it overheats I don’t see smoke coming from under hood of car or when I lift the hood car doesn’t take too long to cool down once the engine is off the coolant reservoir is full but overheating continues could it be the radiator or the thermostat??

My car has 156000 miles.
My car has an automatic transmission.

You may have a stuck thermostat or cooling fan is not working. i suggest having the computer tested for codes stored and cooling system checked for fan operation when running hot. If fan is on when running hot then you may have a stuck closed thermostat or a water pump not pumping coolant. Have a mechanic like one from YourMechanic come and check the systems out for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Lights going on and off in truck

This problem arises with older trucks. The harness, unless it is damaged, is not usually the problem. The problem usually is in the pins coming loose or making bad contact in the fuse box. When this happens, you start loosing...

Car runs hot when idling

Hello! If a vehicle only overheats when sitting, it usually indicates that there is an issue with the radiator fans. It cools back down due to the rushing air that is created by moving, which momentarily acts as a fan...

Car doesn't run right - 2005 Chevrolet Impala

Hello and thank you for contacting YourMechanic. You will need the check the idle air control valve (IAC). It is located just under the throttle body where the throttle plate is. Unplug the harness and check the plug for any...

Related articles

How to Get Chevrolet Dealership Certified
Chevrolet car dealerships offer automotive technician jobs to mechanics who are certified through the many training programs available.
Symptoms of a Bad or Failing Cooling Fan Relay
Common signs include the engine running hot and cooling fans either not functioning or running all the time.
Top Automotive News & Stories: October 1-7
BMW i5 images leak, an ultra-lux Jeep, hydrogen-fueled Colorado ZH2, Fisker's electric future, record plug-in sales, NHTSA Road to Zero, and more.