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Author Topic: Which fuel tank to top up?  (Read 1349 times)

ED-NY

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Which fuel tank to top up?
« on: December 02, 2015, 11:43:46 AM »

Just picked up a 2002 Silverado 3500 6.0 2WD 4L80E 157.5" WB CAB/CHASSIS.

The low fuel light is on and the truck has two tanks, which one do I add fuel to, side tank or rear frame rail tank?  The fuel gauge is burried - I suspect that when they removed the utility bed and unplugged the 7 pin tail-light connector the ground was opened?

Will be using the driveline for another project next year.
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ED-NY

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Re: Which fuel tank to top up?
« Reply #1 on: December 03, 2015, 05:57:17 PM »

OK...the saddle tank was the correct one...................
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GM Guy

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Re: Which fuel tank to top up?
« Reply #2 on: December 20, 2015, 03:53:59 AM »

I am sure GMT800 is the same, I know on GMT400, they say to fill the front first, then the back.

With the ground open, does it pump all the time, or not at all?

For some reason this thread got me to thinking about a pickup I should have bought on ebay, IIRC over 5 years ago, it was a 04 GMC Reg. cab 11 foot chassis, 8.1L ZF6 2wd. only brought mid 3K range. definitely wont find that powertrain combo for a long time. :)
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ED-NY

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Re: Which fuel tank to top up?
« Reply #3 on: December 20, 2015, 08:10:00 AM »

I am sure GMT800 is the same, I know on GMT400, they say to fill the front first, then the back.

With the ground open, does it pump all the time, or not at all?

For some reason this thread got me to thinking about a pickup I should have bought on ebay, IIRC over 5 years ago, it was a 04 GMC Reg. cab 11 foot chassis, 8.1L ZF6 2wd. only brought mid 3K range. definitely wont find that powertrain combo for a long time. :)

FYI: I started the truck and unplugged the front tank while it was running...it shut down so I knew the front tank was the primary. Put in 4 gallons of gas, hit a few bumps and the fuel gauge started working.

Had a chance to buy a 8.1 but performance parts are more common for the 5.3 and 6.0 engines (I'm told).
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