The part in question is the rubber - compound flexible fuel hose, which is to be inspected or replaced every 30,000 miles. (articles.orlandosentinel.com)
2010 Chevrolet Silverado 1500 LT Stock: P2075A VIN: 3GCRKSE30AG112441 Price: $ 22,988 Exterior: Blue Granite Metallic - Blue Interior: Light Titanium / Ebony Cloth Mileage: 74,324 Fuel: Flexible Fuel MPG: 15 City / 21 HWY Transmission... (shoppok.com)
E85, a mixture of 85 percent ethanol and 15 percent unleaded gasoline, is an alternative fuel for use in flexible fuel vehicles (FFVs). (transportation.gov)