Does a 1500 Suburban have any type of screen or anti-spill mechanism in the pipe leading from the fuel cap to tank, preventing a siphon hose from getting to the fuel tank? Chev dealer said there is a rollover protection device to prevent spilling in case of an accident. He said best way to empty tank of fuel is to disconnect the fuel line under the hood and pump it out. Sounds dangerous. Where is the fuel filter? Can I disconnect at that point and either drain or pump fuel out?