Question about 2003 Chevrolet Impala

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2003 chev impala cold engine every thing works properly. drive until engine is hot go into store for 30 min.to start engine i have to press accelerator just a little.

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Clean out your throttle body, the IAC (idle air control) valve may be sticking from carbon build up. You can get a can of throttle body cleaner at Auto Zone or most auto parts store and follow the instruction on the can.

Make sure you use all of the can and you may want to do it twice with two cans of throttle body cleaner just get it all cleaned out. The IAC controls the amount of air enters the engine to get it started and to idle smoothly with the different loads. A stuck IAC valve will give issues to what you have described.

Thank you for using fixya and be safe.

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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Why doesn't my car heat up in idle


Had same problem. You need to add coolant to the engine not at the overfill container but at the engine itself. Do it while it is running. Not hot. It has been a problem with chev. V 6 engines.

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2002 Chevy Impala wont start after letting sit after it warms up


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Mar 29, 2017 | Cars & Trucks

1 Answer

I have a 2003 Buick Rendezvous. The drivers side blows hot air and the passenger side blows cold air. The car has that dual zone climate control. I have no clue where to start.


The actuator that 'blends' cold with hot is stuck in the cold position. There are a couple of options. Disconnect the battery, then drive the vehicle around without using the AC for 10 min, if the AC is defaulted to come on after a battery interuption, then shut the car down then turn it on again. You are trying to get the electronic actuator to reset and resume proper function. Another option is to try this: Start the car, adjust the pax side full hot, drivers full cold, wait 30 sec then shut car down, then start car back up and reverse the settings, pax full cold, drivers full hot. In both solutions, the vent actuators are stuck at either the full open or full closed, so you are trying to get it to 'self check' and allow them to resume proper function. After two years, I simply removed them altogether since I live where it is hot an only need cold.works just fine....

Nov 10, 2011 | 2003 Buick Rendezvous

1 Answer

I have 2003 GMCHD 2500 and the heater is not blowing hot air, turned off the truck and started it again and it will blow hot for 5 seconds and turn to cold again. have you come across this problem before


It is running a test cycle and getting stuck. There are a couple of options. Disconnect the battery, then drive the vehicle around without using the AC for 10 min, if the AC is defaulted to come on after a battery interuption, then shut the car down then turn it on again. You are trying to get the electronic actuator to reset and resume proper function. Another option is to try this: Start the car, adjust the pax side full hot, drivers full cold, wait 30 sec then shut car down, then start car back up and reverse the settings, pax full cold, drivers full hot. In both solutions, the vent actuators are stuck at either the full open or full closed, so you are trying to get it to 'self check' and allow them to resume proper function. After two years, I simply removed them altogether since I live where it is hot an only need cold.works just fine....

Nov 01, 2011 | 2003 GMC Sierra

1 Answer

Change thermostat 2003 impala


Follow the top radiator hose from the radiator to the engine. The housing that contains the thermostat is where the hose attaches. Make sure the engine is cold because you will lose some coolant. Remove the radiator hose. Remove the two bolts that hold on the thermostat housing. Remove housing. Do not remove the thermostat until you have the new one ready to put in and put it in exactly in the same direction as the old one. If you don`t it will not work properly. Re-assemble everything taking care not to over tighten the housing bolts. Top up the coolant and start the engine. Observe the coolant level until the engine is at operating temperature and check your coolant level. Top again if needed.

Jan 30, 2011 | 2003 Chevrolet Impala

1 Answer

My heater/blower on my 2003 Impala will not start right away. Usually, I drive for like 5 minutes and then it will go on. When I turn the car off, the same thing happens -- I have to wait 5 mins or so for...


If it has automatic climate control this is normal. The blower motor will not come on until there is heat for it to actually blow. During the first few minutes of driving you would only get cold air if it was blowing as the engine coolant has not warmed up. You should be able to set it to manual control.

Nov 27, 2010 | 2003 Chevrolet Impala

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