Question about 2003 Chevrolet Malibu

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What make 2003 chevy malibu temp hand goes up and down.when it goes up it make the car seem to be running hot than it goes back down and than the car runs better

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The most common reason would be a bad thermostat or the car is low on coolant, check the coolant level make sure the engine is cool and check the level, if the level is full then i would say to replace the thermsostant, the thermostat is what regulates the flow when it reaches a certain temp, also take note that the fans on these type cars dont come on until they reach a high temp, the gauge on them reaches close to 3quaters the way on the gauge before the fans run, good day.

Posted on Mar 31, 2011


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I changed my water pump on my 2000 chevy malibu and i change the thermostat and my car is still running hot the gague goes all.he way up

Are you sure the radiator is full of coolant and has no air pockets ?
How long does it take for the temp gauge to go up to hot ?
Do you know for a fact the engine really is hot ?

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My 1999 Chevy Malibu runs hot? It started when it overheated. We changed the thermostat, then water pump, then temp sensor gauge and the temp gauge goes high but only when the heater stops blowing hot...

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Sep 20, 2011 | 1999 Chevrolet Malibu

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Need to recharge 2003 chevy malibu air conditioner. where do i find the intake to recharge it.

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Jul 11, 2010 | 2003 Chevrolet Malibu

2 Answers

I have a 2002 malibu and the cooling fans won't come on with the a/c off on there own even if the temp goes in the red. If you turn the a/c on the fans will come on and run until the temp goes down to...

I have the same problem in my chevy malibu 2003, I know the problem is from engine programing (car system) but no one can fix it only by reprogramming the car but it is difficult to do it. What I did is I took the car to a car electrician shop and I ask him to let my car fan work once I start my car. He just put some wire inside fuse box and also add one extra wire between one fan and the battery and it is working well now. The electrician told me "but this will decrease the life time of the fans because it should be only run once the car is hot". Then I told him "just do it" because I know that if didn't do it, my car will damage from high temperature and the engine gasket, fuel pump, water pump, power stirring pump, electric sparks could be damage from high temperature. So if the fans become down, I will change it no problem which will not cost me more than 35$ rather than the big damage which might happen if I didn't switch it on, might cost me thousands of dollars. I did it more than 3 months a go and it is working fine. No my car temeperature around between 1/4 and 1/3 of the full temperature.

No more overheating.....


Apr 30, 2009 | 1999 Chevrolet Malibu

2 Answers

99 Chevy malibu 2.4L engine coolant temp sensor

its at the end of upper radiater hose at housing for thermostat.

Mar 31, 2009 | 2003 Chevrolet Malibu

1 Answer


need more info. does it make any noises switching to heater does A/C work? If no noises and A/C works how is the running temp of the car, could be thermostat

Jan 05, 2009 | 2003 Chevrolet Malibu

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Coolant Temp Sensor 03 Malibu

coolant sensor maybe 19 mm key its near the upper radiator hose in the engine thanks pierre

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