Hi im trying to find out if my grand prix has a thermostat .not sure if it does i thought maybe it might be built in

I have 2003 one problem is sway bar and I do see on others broken mine has left the side.

find the bleed valve on coolant system and burp it. make sure you are using a good 50/50 mix of coolant.
maybe run a coolant system cleaner . maybe a clog?
if worst come to worst blow head gasket

Ok fellow 2006 Grand Prix owners!! By trial and error, I went through the process of elimination because my car would over heat and had no heat inside. After changing the thermostat, I had to replace the water pump. However, after you do this, you need to open the inlet hose bleeder and let the air out a few times. This solved my issue of overheating and I now have great heat!!!

The first things to do are: 1. Make sure the radiator is full when the engine is cool (check the fluid in the radiator as well as the overflow tank). 2. Make sure the thermostat is working. 3. Have the lower intake manifold gasket checked. The Grand Prix SE came with a 3.1L engine (standard) and these engines are famous for lower intake manifold gasket problems.

maybe a water pump.

it really sounds like a thermostat to me it wouldn't be a heater core

Is the blower motor working? if not have you tried checking for a bad fuse. If the blower motor is working and you just aren't getting in warm air you may be low on coolant or maybe your thermostat is sticking. Trying checking these 1st if you haven't already. hope this has been some help.

Isn't that thermostat rite in the rad cap hub? maybe you should pick up a service manual at part store that will show you all and more!! good to invest in if your doing your own work!

i dont think it needs a waterpump. what temperature thermostat did you put in? unless the fan is running all the time maybe. i would try another thermostat, the engine needs to be at least 195 degrees to produce decent heat.

first thing is to check to see if the "check engine light is on...if so, check for trouble codes, then address any codes that show up...if the "check engine light isn't on, then you should do a pressure test on your cooling system, to see if maybe you have a head gasket leaking, (most rad shops will do this for little or nothing $$$) If you haven't changed your fuel filter in a while you should do that anyway. If everything checks out so far than you should check your fuel pressure, with a pressure guage. You may also want to do a compression test if the above seems o.k.

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