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My Montana Fuel gage is acting up

4 messages,  Last post on Apr 15, 2009 at 8:24 AM

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#1 of 4 My Montana Fuel gage is acting up by macnio Aug 09, 2008 (6:50 pm)
we bought a used 2003 montana and for the first month no issues, but now the fuel gage is really acting strange. start the van and the fuel pegs out to full. and if you put it in gear right away and drive it stays there. but if you have an extended stop or just simply sit idle for a few minutes the gage goes all the way down to E and the fuel low warning goes off. This happens no matter the amount of fuel in the tank. we have had to resort to milage watching which is ok, but I would really like to get this fuel gage issue resolved. any ideas??? Replies to this message: ray80 (Aug 13, 2008 5:57 am) youravtech (Apr 15, 2009 8:24 am)
#2 of 4 Re: My Montana Fuel gage is acting up [macnio] by ray80 Aug 13, 2008 (5:57 am)
Replying to: macnio (Aug 09, 2008 6:50 pm) Generally speaking, the usual suspect for this kind of thing is the sending unit (located in the fuel tank). Not sure if its applicable to the Montana or not, but that Azteks and perhaps the Rendezvous can have issues with a large electrical connector to the rear and under drivers seat that controls a lot of stuff towards rear of vehicle. It can allow water intrusion and corrode and cause various problems (like yours).
#3 of 4 2004 Pontiac Montana - Inaccurate Coolant Temp Gauge by mikeyd17 Nov 10, 2008 (12:18 pm)
Hello,   I have a 2004 Pontiac Montana with about 107500 kms on it (VIN: 1GMDX03E24D183870) and the coolant temperature gauge is not working properly. Sometimes when I start my van, the temp gauge is pinned at MAX temp and stays there the whole trip...other times it's pinned at MIN temp...and other times it seems to work OK. When it's pinned at MAX temp, I check the actual temp that the on-board computer is seeing, by using my ODBII scan tool...and I get about 87 degrees C when I'm halfway into my trip (i.e. - when the van is at operating temp), which seems OK. All the other analog gauges are working perfectly.   What could be causing this? Any ideas? I read a lot about the issues with "connector C305" on the Internet on the Montana vans...could this be the problem? Any help would be very much appreciated. Thanks very much in advance.   mikeyd17
#4 of 4 Re: My Montana Fuel gage is acting up [macnio] by youravtech Apr 15, 2009 (8:24 am)
Replying to: macnio (Aug 09, 2008 6:50 pm) I have a 2000 Montana and had the same problem. This van is known for having a bad fuel sending unit.

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