Question about 2001 Pontiac Montana

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2001 pontiac montana overheating no warm air when heat is on

I just bought this van and it is overheating and there is no heat, we just replaced the thermostat and flushed the rad. but no different any ideas

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  • classy_gene Mar 14, 2009

    I have the same problem with my van. My head gasket is bad and it is causing air to build up in the coolant system and not allowing circulation. My coolant level is fine, I hear is gurgle every once in awhile and wasn't sure what it was until one day the gauge pegs hot. Usually when a Temp guage goes hot you can turn the heat on High and remove some of the heat. Mine just blew out cold air. I removed the radiator cap after it had cooled and a bunch of air came out into the overflow tank. I bled the air out the system and has been running "normal" for several days. I have been told that these 3.4L are really bad about blowing head gaskets. Anyone have any advice about changing head gaskets?


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Might be a weak or failing water pump... Does it leak antifreeze or do you have to add antifreeze very often? When the engine gets to operating temperature squeeze the top radiator hose and see if you can feel pressure from the water pump forcing water through it.

Posted on Feb 21, 2009

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If you installed the thermostat properly (not upside down) then check the radiator for corrosion or rust, as this would have clogged up the heater core as well, If the rad is ok then you have a head gasket problem.

Posted on Feb 21, 2009

  • bxtor1 Jan 13, 2011

    we have the same problem and have already changed the head gasket a few months ago it was fine now it started overheating and has no heat but the head gasket was expensive and hard my husband did most of the owrk himself and still costed a small fortune if u find out what is worng please repost to help the rest of us out


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1 Answer

Heating system

I'm quite certain what your problem is. The fluid level is too low. Now wait, it's not that simple. In order to bring the coolant level to the correct height on this vehicle, ready for this?, You have to jack up the front of the van or drive it to an upgrade that is quite steep. The reason for this is that the heater core is almost a foot higher than the level of the radiator. I found this out by trial and error. Most dealerships don't evn know about this. I'm assuming you've already ruled out the easy stuff such as a bad thermostat or radiator correct? Let me know how you make out, okay? Thanks, Dana.

Mar 29, 2012 | 2001 Pontiac Montana

1 Answer

I have a 2001 Pontiac Montana and the self leveling system has the van stuck in the up position. It has been that way 2 days and will not deflate. What could be the problem?

a faulty height is located in the back of the van on the rear axle beam under the van connected to the frame to axle...when u place a load in the van the height sensor compresses sending a signal to the air pump to turn on to raise the van to level height

Jul 16, 2011 | 2001 Pontiac Montana

1 Answer

My air conditioning does not blow cold air, just warm air? What part needs to be replaced? i have a 2003 pontiac montana van

You may just have to have the system recharged with coolant. When was the last time it was checked?

Jun 23, 2010 | 2003 Pontiac Montana

2 Answers

2001 Pontiac Montana - what is a misfire #5?

Without your actual trouble code, I am assuming that you are have a misfire on cylinder # 5. The computer cannot really tell what is causing the misfire only that cyl 5 is not putting out full power. If it misfires when cold then smooths out as it warms up, I would say it is probably an injector that is sticky, as it warms up it starts working properly.

Apr 29, 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

2001 Pontiac Montana overheating

you have air pocket in system let run with rad cap off you should see it burp after it does take down road full throttle should move pocket and gausge should go down.

Jan 05, 2009 | 2001 Pontiac Montana

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