Question about 2005 Chevrolet Monte Carlo

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2005 supercharged monte carlo has very little heat.

My wifes 2005 monte has very little heat.The temp gauge looks like the engine is only running about 170. This is not a new problem as the car
heater has not worked well from day one. The temp gauge seems to swing from 170 to 195 when the car is at idol, but on the highway it just sits at about 170.

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  • Anonymous Feb 21, 2009

    The heater has never been great but when it's 20 below I run it on highest setting and still nearly freeze to death.

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170 is ok, this should provide excellent heat output, your problem is one that is common on many newer car, it is caused by the air temp control blend door actuator motor, I hate this system because it is prone to failure and requires the removal of the dash to repair/replace the part.

Posted on Dec 24, 2008

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1 Answer

Changed thermostat in 2005 monte carlo but temp gauge still rises slightly higher than before and there is some bubbles in the coolant reservoir


You have a check light on,but I see
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Bubbles-failed head gasket or intake gasket- maybe

Have to test for exhaust gases in the coolant

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Replaced water pump thermostat temp sensor but temp gauge read all the way up when car is first started 3100 engine in 1996 monte carlo


For the temp gauge to read at full heat when the engine is cold is an indication of a short in the wire to the sender unit or you have connected the wrong wire to the sensor/sender unit.

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Car is a 2004 Monte Carlo SS Supercharged. My check engine light will come on for about a day and then go out for two or three days, and then back on. It stays on steady and does not blink. All gauges...


Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check and let me know if you have questions.

Be sure to ask for the history when you get a scan. The computer stores all codes, even if the light has gone off. Report the codes back to us for analysis.

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Tachometer, fuel gauge, temp gauge don't work. walk2957@aol.com


Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Monte Carlo instrument cluster repair

Sep 02, 2010 | 2005 Chevrolet Monte Carlo

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I have an '05 Monte Carlo SS supercharged and my problem is with the fuel gauge. It used to work intermittently, now it reads whereever it wants. It does drop (at least most of the time) when the tank...


There was an issue with the sending unit itself. There were 4 or 5 thin contact points on the sending unit. The new ones have 3 thicker contact points, they tend to last longer. As the contacts break off one by one the fuel gauge becomes intermittent and then nothing.

Jan 20, 2010 | 2005 Chevrolet Monte Carlo

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Heater takes forever to heat up 2004 Monte Carlo SS supercharged


it may be time to put a new thermostat in,that will bring the engine up to operating temp quicker,and your vehicle computer and sensors are designed to be at 195degrees

Dec 08, 2009 | 2004 Chevrolet Monte Carlo

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HELP!! Having electrical issues with my 2005 Pontiac


electical is hard to diagnose with out being there. i would treat each problem seperately. first you will need to test the engine temp gauge sending unit. in a dealership this is easy with a scanner they can run a sweep test to se if the gauges are responding.you don't want the engine to over heat if the gauge is not working. next problem the dome light should be easy to fixe does the dome light work with the dome switch?remove the bulb and with the doors open and switch on check for voltage, if voltage check connection and or replace bulb. if no voltage check fuses for voltage.last will need to have the dtc po243 checked out by a repair shop. i hope this will help.

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2000 Monte Carlo SS (89,000 mi)


That slushy brown stuff is signs of a blown head gasket. Have a code scanner hooked up to find out why the light is on, it will probably show coolant temperature sensor. Just out of curiosity, check the pvc valve (if your car has one), and see if it's clogged. If it is replace it, the crank case is not getting ventilated.

Jan 30, 2009 | 2005 Chevrolet Monte Carlo

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1997 monte carlo no heat


are you sure you COMPLETELY filled the cooling system with anti freeze?

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2005 Monte Carlo Super Charger Oil


On the supercharger snout, located immediately to the right of the coil pack mounted closest to the supercharger, is the supercharger oil plug. It is a hex nut that uses a 3/8" allen wrench.

When the engine is cold, remove the plug. You can use any item of your choice that will create vacuum such as a siphon, a turkey baster or my favorite is a squirt bottle nozzle with about a 12" line on it.
Insert your hose into the reservoir hole and remove as much of the oil as you can. If you use the squirt bottle nozzle then if the hose is long enough then you should be able to "snake" the hose down into the reservoir almost the entire length of it by pushing the end of it toward a "1 o'clock" position if you are standing directly in front of the car.
Squirt the oil into another container. If your oil is the GM supercharger oil, it is animal fat based and biodegradable and can go in your regular trash.
Refill with GM supercharger oil or any other appropriate lightweight oil specified to meet requirement for the Eaton M90 supercharger. An equivalent oil can be purchased from www.zzperformance.com.
Fill the reservoir until the fluid reaches the bottom of the fill hole threads.

As an added note, if you lose the hex nut cap for the reservoir it isn't necessary to order a new one. A 7/8" fine thread bolt will fit perfectly but be careful not to torque more than 8ft/lbs with either the nut or bolt.

Aug 02, 2008 | 2005 Chevrolet Monte Carlo

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