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02-14-2019, 11:15 PM
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#1 |
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More hobbies than money!
Join Date: Jan 2002
Location: Raleigh, nc, usa
Posts: 655
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03 Yukon 2500 8.1ltr fuel pump
I am struggling with figuring out which fuel pump for this truck. Or is there a way to rebuild the pump?
All of the guides for pumps talk about front tank, rear tank, aux tank. Didn't know yukons came with more than one. Mine only has one that is almost 40 gallons.
__________________
'70 cst10/swb 350, 3 on the tree, factory buckets. '70 GMC lwb 350/350 ps,pb '72 c-10 lwb 350/350 a/c, ps, pb '72 Blazer project |
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02-15-2019, 07:26 PM
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#2 |
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Registered User
Join Date: Oct 2009
Location: .
Posts: 2,187
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Re: 03 Yukon 2500 8.1ltr fuel pump
Nope, you have 2 tanks. One mounted along the left frame rail in front of the rear axle. The other is a big flat square one mounted behind the rear axle, and above the spare tire.
If the engine isn’t running, it’s because of the pump in the front fuel tank. |
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02-17-2019, 05:59 PM
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#3 |
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More hobbies than money!
Join Date: Jan 2002
Location: Raleigh, nc, usa
Posts: 655
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Re: 03 Yukon 2500 8.1ltr fuel pump
You are correct. Pulled them both. Both pumps have failed. Pulled them both and neither worked when putting voltage directly to the pump.
__________________
'70 cst10/swb 350, 3 on the tree, factory buckets. '70 GMC lwb 350/350 ps,pb '72 c-10 lwb 350/350 a/c, ps, pb '72 Blazer project |
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02-17-2019, 06:01 PM
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#4 | |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: 03 Yukon 2500 8.1ltr fuel pump
Quote:
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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02-17-2019, 07:28 PM
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#5 |
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Registered User
Join Date: Oct 2009
Location: .
Posts: 2,187
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Re: 03 Yukon 2500 8.1ltr fuel pump
The filler neck goes to the rear tank. Then there is a big filler tube between the rear tank and the front tank. There is also a pump in the rear tank that will pump fuel into the front tank. The rear tank is used like a transfer tank. The computer looks at the fuel levels in each tank and it will decide when the rear fuel pump runs. It will also send a signal for the fuel gauge.
All 2500 suburbans from 00-07 have 2 tanks. |
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