When replacing the fuel pump in my 95 S10 I had to empty the tank. There
was a ball captured at the fuel entry point of the tank that prevented
getting a siphon hose beyond that point. It's captured in a 3-fingered
manner and a stiff poke with a garden hose dislodged it into the tank.
Beware once there, the only way to replace it is to remove the tank.
You might consider adding a fitting to the truck's fuel line for purpose of
getting fuel out. I'd first check to see if the 2002 has a "fuel pump
prime" lead that will let you run the pump without the key on.
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