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bikernut · 05-23-2010, 07:46 AM

My 87 K2500 with dual tanks will push the right fuel into the left tank when it is parked and not running, until the tank is try. Any one have any ideas why this is happening? I don't know if the left tank is sucking the fuel into it or the right tank is pushing it to the left. I don't see how it can do this as the internal valve shouldn't let it do so and I can hear it switch when I activate the rocker switch in the dash.
I want to check my fuel lines that go to the transfer valve under the truck, does any one have a diagram of the hose locations on the valve so I can check this?

05-23-2010, 07:46 AM	#1
bikernut Registered User Join Date: Jan 2008 Location: Soutwestern New Hampshire Posts: 145	fuel swap My 87 K2500 with dual tanks will push the right fuel into the left tank when it is parked and not running, until the tank is try. Any one have any ideas why this is happening? I don't know if the left tank is sucking the fuel into it or the right tank is pushing it to the left. I don't see how it can do this as the internal valve shouldn't let it do so and I can hear it switch when I activate the rocker switch in the dash. I want to check my fuel lines that go to the transfer valve under the truck, does any one have a diagram of the hose locations on the valve so I can check this? __________________ 2020 GMC Acadia Denali (Maroon) 2003 GMC 3500 4X4 Dually Dump (Red) 2007 KZ 41KG Toy Hauler (White with stripes) 2015 Harley FLHTCUTG Trike ( Maroon) 1995 Harley FLT (2 tone Red) 1992 Chevy S-10 4x4 Blazer (Dark Red)