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Chevrolet Impala Coolant System



  • I have a 2005 Chevy Impala, and when I go to take off, I hear what sounds like water sloshing. It sounds like it is behind the glove compartment. I don't know if it is water in some sort of drain pan that won't drain or what. Does anyone know what this might be and how I could stop it? Thank you in advance!! :confuse:
  • I just purchased a 2003 Impala and I'm having the same issue. Were you ever able to find out the problem??
  • I took it to a radiator shop and they did a full cooling system flush. They removed the radiator and everything and cleaned it all out real good. I have not had any other problems since. They charged me just under $200, but it was more work than I wanted to fool with, so I think it was well worth it. Good luck.
  • cobcob Posts: 210
    You have air in the cooling system. It is not necessary to get the coolent flushed. When the engine is cold remove the radiator cap and start the motor the air should come out when the coolent cycles.. Whoever did the last coolent flush did not do it properly.
  • While I am not arguing your reply, just in my case I have to say that my cooling system had never been flushed before. My car had never had any trouble what so ever with the cooling system. It started heating up one day while in traffic and it had never done it before. I had almost 100.000 miles on it at the time and I am in traffic on a daily basis. All I know is once it was flushed and refilled, the problem was gone. I dont know if it is possible to get air in the cooling system without flushing the system, but it had bee months since I had even had just the cap off. But, who knows. It works great now.
  • jaja1993jaja1993 Posts: 1
    when you changed the coolant sensor did this solve your problem on your impala i'm having the same problem i changed the sensor but no help thanks
  • jigojigo Posts: 1
    edited December 2010
    I have a chevy impala 2004 with a check engine light on code P0128.. 1st i replaced coolant temperature sensor near the thermostat mount then reset check engine light to turn off, next day, light came back on with the same code, i replaced the thermostat and reset the light again, the next day engine light came back on again with the same code P0128... I dont know what else to do. Pls help Anyone out there!
  • jofixitjofixit Posts: 1
    I had a similar problem. Eventually, my mechanic took the computer to Chevy and had it flashed. This is a hard reset. It worked, no problems since. My car kept throwing codes, we'd change sensors, and would still throw that code plus 7 or 8 more. But always the same codes no matter what we replaced. As far as I know, only Chevy dealer has equipment to flash the computer. Cost me $100. Hope this post helps someone. Cause I spent about $600 in sensors before doing this.
  • 1nkablecar1nkablecar Posts: 1
    I have been working on an Impala 06 for a no start no power condition. A young man was trying to put a sound system in it and he shorted out something and now it doesn't have any power any where. The battery is good and all the relays as well, also none of the wiring is really damaged or fried so I'm think it maybe the pcm, but would like some suggestions.
  • dafritmandafritman Posts: 1
    Hey, if you look under the hood on the left side near the coolant reservoir there is a big connector with a blue release handle, separate the connector by flipping the blue handle( unless it comes apart without flipping it) and then reseat making sure blue handle is fully locked down, this is the main connector for the Body control module, and will typically fix a no power in cabin situation. let me know how it goes.
  • My 2004 Impala began overheating and blowing cold air through the heater on January 2, 2013.
    I had the auto shop drain and flush the system and replace the thermostat. The system will reach the red zone after a few minutes of operation and blow cold air, then it will cool itself off to normal range. Sometimes it will blow cold air and sometimes it will blow hot air. It seems to lose power when it passes the red zone, but the power comes back when it cools off a little. Drove it for two hours last night with heat in the cab, but it blew cold air and overheated when I entered town. The mechanic wants to replace the head gasket at a $1000. I am not losing any coolant so I'm not sure it is a head gasket. The system has been bled by the mechanic and the dealership at least a dozen times and the problem still persits. Any thoughts?
  • timboyoutimboyou Posts: 1
    Have you made sure your cooling fan is coming on, try taking the thermostat out to see if that helps,it could also be a bad cap.
  • I have a 2000 Impala with 117,000 began to overheat so have replaced the radiator and the thermostat. It still seems to run warmer than I think it should but have been told that the new thermostat is probably a higher temp than what was originally in there. Now there is a loud roaring noise that sounds like it is coming from the front of the engine. It is not constant but when it is there, it is sometimes very loud and other times just annoyingly loud. Both of the fans are coming on. Any ideas?
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