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Re: [GMCnet] Fuel tank Sending Unit [message #76763 is a reply to message #76755] Mon, 15 March 2010 18:34 Go to previous messageGo to previous message
emerystora is currently offline  emerystora   United States
Messages: 4442
Registered: January 2004
Karma:
Senior Member

On Mar 15, 2010, at 5:25 PM, Mark Torgerson wrote:

> Wow - Thank you - you are right. As I understand it both tanks
> drain down at about the same rate ....
>
> Thank you! I'm still looking for one local here in Portland
> Oregon....
>
> Damon
> '73 Canyon Lands
>


They only drain down evenly to about the half tank level. After that
if you are going up and down hills you will have absolutely no idea
if you have any fuel in the AUX tank and doin't have a sender in the
tank.
The fuel will flow from tank to tank. Usually from the AUX tank to
the MAIN tank due to the location of the fill inlets.

I know this from when I first got my GMC years ago. I had working
gauges on both tanks but when I switched to the AUX I found it was
almost empty. I walked 10 miles round trip to get a a can of gasoline.

Emery Stora
77 Kingsley
Santa Fe, NM

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