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95 S_Trucker · 02-17-2019, 07:28 PM

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.

02-17-2019, 07:28 PM	#5
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,179	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.