- #37 of 46
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2002 Pontiac Montana making squealing noise
by SoonerTideLady
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Dec 10, 2008 (3:57 pm)
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We have changed pulley after pulley the water pump has been changed the power steering pump has also it just got changed the other day and after it got changed it is sluggish to start up and it still squeals really bad i was told that it might be the alternator, i really don't know what it could be could someone please help? thanks for your time.
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- #38 of 46
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2001 montana wont idle
by greyduke3
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Dec 11, 2008 (3:31 am)
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wont idle ive changed the throtle postion sensor and the idle air control valve.please help i dont have any thing to drive.  
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- #39 of 46
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Re: HELP! 2004 Pontiac Montana. [dsgentili]
by havnfun2
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Jun 11, 2009 (4:42 pm)
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Replying to: dsgentili (Mar 11, 2007 5:34 pm)
My Moms Montana did the same thing....go and get a Throttle Positioning Sensor for about $35... they tried to tell her it was the intake gaskets leaking and wanted her to pay $1800....she called me and I told her it was the TPS and since we replaced it she has had no more problems with her van speeding up on it's own...hope this helps if you haven't already figured it out.
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- #40 of 46
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Re: HELP! 2004 Pontiac Montana. [havnfun2]
by tigeroverflow
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Jun 11, 2009 (10:37 pm)
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Replying to: havnfun2 (Jun 11, 2009 4:42 pm)
Thank you for your posting. This would have been an interesting thing to look into. After mechanics were split as to what was causing the problem, it was recommended by "all" to trade in my much-beloved van. So, after it overheated on the freeway - during a test drive related to the trade in (!!!) I really had to trade it if possible and did. The GM dealership gave me full value and a good price on a Chevrolet Uplander 2006 w/ low miles. It is NOT the van the Montana was - so miss the Montana! An almost loaded Uplander is a bad joke compared to the Montana - so many things missing, lower power, just everything. But for now, will hang on to the van, for timing of other things in life issues. Bigger picture - if the used car economy was a stronger market, I would get rid of it for a Montana - even an older one. Got the Uplander in December. It is going into the dealership for more repair work - for I think this is the 5th (!!!) time. Problems with gear shift getting stuck, horn still doesn't work, had a nearly broken tie rod that dealership didn't fix before selling the van, and the list goes on. Thankfully, other than wasting time, it has a happy ending since I bought the most extensive full five year extended warranty. For anyone listening to this - get the warranty. At $2000 it is a bargain! Less than six months into this - if I had had to pay for all these repairs out of pocket, I would have been out of pocket at least another $500 by now. The warranty covers first dollar - so I have had no additional money paid out. Meanwhile, Pontiac Montana - the model I had - wonderful van. Should have just put the $3-4000 out and fixed it, hindsight.
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- #42 of 46
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electrical issue
by chiebut
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Oct 18, 2009 (8:16 pm)
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hi! i've had 2000 montana the problem is when i'm driving it all the guages shuts off and when i move the steering wheels it goes back! and my fuel gauge is unstable int goes up and down and most of the time is always full even though it's not! need help!
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- #43 of 46
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Re: electrical issue [chiebut]
by kennie
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Oct 19, 2009 (7:28 am)
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Replying to: chiebut (Oct 18, 2009 8:16 pm)
Re the fuel gauge... this is very common in montanas... mine has done it for 3 years and it's a 2000. Just use the odometer to indicate how many Kms you've gone and then fill up... the cost to fix just is not worth it unless you have warranty. I believe the "LOW FUEL" light is indiependant of the gauge problem so when it comes on you are definately low in the tank on fuel... this is the way mine works. You would have to have the fuel sending unit replaced and it is located in your gas tank very likely... they can test that is is failing by testing the wires.. if certain voltages are read they can tell it's gummed up. Cleaner can be poured in the gas tank to attempt to clean it but i'm not sure if it is worth of the risk of plugging something or running such cleaner through your engine if you don't absolutely have to.. the cleaner I think is called sea-foam I think. Cheers.
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- #44 of 46
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Re: electrical issue [kennie]
by ray80
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Oct 27, 2009 (6:55 am)
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Replying to: kennie (Oct 19, 2009 7:28 am)
Also for the fuel gauge (I believe its applicable for a 2000), it may be an issue with the c-305 connector.
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- #45 of 46
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Re: electrical issue [ray80]
by kennie
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Oct 27, 2009 (7:25 am)
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Replying to: ray80 (Oct 27, 2009 6:55 am)
What is the c-305 connector and what does it do??
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- #46 of 46
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Re: electrical issue [kennie]
by ray80
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Oct 27, 2009 (8:02 am)
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Replying to: kennie (Oct 27, 2009 7:25 am)
Its a pass-thru connection for wiring (from inside cabin to outside/underneath). It connects various wires for things in rear of vehicle(including connection to fuel pump/sensor). While its weatherproof on bottom (underneath) it is not inside cabin, spills/ various leaks inside can cause water intrusion and subsequent corrosion of wires. Google ' gm c305 connector' and you will find lots of stuff.
The connector should be under carpet to the rear of drivers seat (you may be able to see exactly where by looking under vehicle for a bundle of wires that come out from cabin)
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