Three problems related to water pump have been reported for the 2004 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Impala based on all problems reported for the 2004 Impala.
Power steering hard and trying to run hiit changed water pump.
Intake manifold gasket. Why are the defected? there are so many complaints about faulty ones and still you have not changed to better gaskets. First the heat goes and then the car overheats for no apparent reason. Changed the water pump and thermostat. Now the gasket. For the price you pay for this car it should not have to cost me another 800 to 1200 more for a part you can fix with changing your product you use. I have own GMC products for over 20 years and this is my first complaint about them. Just because I am having problems with my Impala will not keep me from telling people that GMC has good cars. Just wish this problem will fixed for future owners. Would hate to be called a liar. One of our GMC's is a 78 sierra classic which was bought brand new in 77.
Engine hesitates,stalls, and shifts hard. Had to replace ignition switch and lock cylinder, heat sensor, fuel cap, reprogram antitheft, water pump, always getting bubbles in tires, gauges dnt work, puddle on pass side, heater core, 2 sets of warped rotors, traction control(abs) keeps going off, found wires under hood chaffed( by rubbing on belt I believe)which caused no start. New problems are lights on dash and head lights will turn off at night while driving, I have a coolant leak which I think its due to blown gasket, and tonight I am driving in fog and my front window fogs up in 2 seconds. I wiped w hand and realized I was heading towards a person walkn. Way to dangerous!!!!! I have had car for only 2 yrs. I am divorced w 3 kids and 1 special needs child w lots of appts. I need a reliable car, cant afford new car or a shop to fix car. I have had to become a mechanic cause of this car and I have no time for that, thank god for internet, I wnt take kids in car after dark, it unreliable and thats sad. Please look into issues.