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Fuel does not transfer from one tank to the other

Tiny
1000YDBDC
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 57,000 MILES
Dual tank system, fuel does not transfer from one tank to the other, fuel guage stays on full
Wednesday, January 18th, 2012 AT 9:51 PM

8 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Might want to start by checking the transfer switch
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Wednesday, January 18th, 2012 AT 9:53 PM
Tiny
1000YDBDC
  • MEMBER
  • 3 POSTS
Where is the transfer switch?
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Wednesday, January 18th, 2012 AT 10:13 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I don't have the information you're looking for as per the transfer switch in our technical references, Please, await for another expert to response that has the information -I'm sorry and TY for using 2carpros
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Wednesday, January 18th, 2012 AT 10:33 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
The ECM is the transfer switch on this one. Is this a Duramax, or gasoline pickup? They are different systems that operate among the same principle.
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Wednesday, January 18th, 2012 AT 10:38 PM
Tiny
1000YDBDC
  • MEMBER
  • 3 POSTS
Its a 6. Ol k3500 dump body
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Wednesday, January 18th, 2012 AT 10:49 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
The gas variation has two fuel pump modules, with two senders that are wired to the engine control module. There is no transfer of fuel. If it were a Diesel, it would have a transfer pump mounted to the frame rail. I would suspect you have a faulty fuel pump in one of the modules.
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Wednesday, January 18th, 2012 AT 11:12 PM
Tiny
1000YDBDC
  • MEMBER
  • 3 POSTS
When th fuel guage read 1/2 both tanks would take about the same amount of fuel when filled up. Now the fuel guage stays on full and one tank could take 30 gals and the other one would take less than 1 gal. When you say fuel pump module I aasume you are reffering to the sending unit assy in the top of the tank. Is this correct?
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Wednesday, January 18th, 2012 AT 11:41 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Yes, that is correct.
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Thursday, January 19th, 2012 AT 12:48 AM

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