- #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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