Question about 1999 Pontiac Montana

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Low coolant light comes on

I have a 00 pontiac montana, the low coolant light comes on and will not go off, the van is not overheating. im not sure if it is the thermo or a sensor.

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  • kuntreeboy08 Nov 12, 2008

    which sensor and where at

  • RickandPatty Beckett Oct 05, 2013

    on the side of the radiator passenger side top

  • Anonymous Mar 30, 2014

    overheats when im not moving the faster i go the temp drops

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  • 160 Answers

If the van is not overheating and the coolant is full than your sensor is bad

Posted on Nov 12, 2008

  • james lee Nov 12, 2008

    coolant sensor usually mounted in coolant tank

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While driving down the road in my 2003 pontiac montana. The change oil light comes on and high temp warning light comes on. When the high temp light comes on the van losses all power.


Check the coolant first. Add as needed. Once full. heat it up in the driveway and check for leaks. 3.4 montana, I would guess the water pump. Change the T stat also.

Aug 09, 2015 | Pontiac Cars & Trucks

1 Answer

While sitting at a drive through or at a red light my van will run hot and the hot coolant light comes on.


sounds like thermostat is sticking or cooling fan or or fan sensor is bad....but first have you checked the coolant level,,could be low....hope this helps and good luck.

Aug 18, 2012 | 2000 Pontiac Montana

1 Answer

Hi carl i had pontiac montana m1999 overheating after i travel like 40 km n all the coolant going back to the reservoir


Hello, if you've changed the pump. cap. and t-stat and its overheating still i need to say that just because you replaced those parts doesnt necissarily mean they work. Im mainly talking about the t-stat and cap. was this your first time installing a tstat? They go in a certain way. Make sure you put it in the right direction. Your vehicles engine might require you to purge your coolant system of all air. On some cars air will remain trapped in the area right at the tstat causing it not to work therefore not opening up and no t circulating the coolant. I would start there myself. If thats not the case, next id flush the radiator. I would like to know what the problem symptoms were wich led yoy to replace those parts please.

Dec 07, 2011 | 1999 Pontiac Montana

2 Answers

Just got an oil change and the oil change light is still coming on (it was doing this before I got it changed and the time before that) but now, the low coolant light is on as well...they checked all the...


To clear the oil change light,turn the key to on,and press the accelerator pedal three times real slow within 5 seconds,this will clear the light,now on the coolant light sensor,low coolant,remove the sensor on the passengers side of the radiator,it has a wire clip,so use a small pick,with a slight hook on it,the sensor is square,and flat,You will see,it needs to be cleaned out,most likely with air pressure,then put the clip back on the sensor,and it will snap back on,refill the radiator.If this was at all helpful,please rate,I have a 2000 montana myself,

Jun 28, 2010 | 2000 Pontiac Montana

1 Answer

Head lamp wont work


Try replacing bulbs they could have both gone at the same time,I think it takes a 9006 bulb. You could check by pluging low beam plug into high beam bulb if it works the low beam bulbs are gone

Feb 06, 2010 | 2001 Pontiac Montana

1 Answer

Blowing cold air no heat


make sure coolant is in radiator....if its full, thermostat may need to be changed.....if thats not it check heater coil

Jan 03, 2010 | 2004 Pontiac Montana

1 Answer

It is 5 below zero here in Minnesota, I went out to start my 2000 Pontiac Montana van and after about 15 min. she overheated as well as no heat in the van. suggestions?


Sounds like maybe the coolant is low or out. thats the first thing to check. If the coolant was full, then the heater would be roasting hot.

Dec 15, 2009 | 2000 Pontiac Montana

1 Answer

We have a 1999 Pontiac Montana with an unknown trouble code.


P1483=engine cooling system performance
Are you adding coolant each time this light comes on in the coolant reservoir?
if so,you need to find where it is leaking out,

Nov 21, 2009 | 1999 Pontiac Montana

1 Answer

Coolant problems related to transmission?


tran should be ok need to take head to repair shap and be sure head is ok and not cracked. thermostat, radiator, or cap, hoses need to be checked to dtermine what caused it to run hot also check engine fan. Pls rate this solution

Feb 17, 2009 | 2000 Pontiac Montana

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