It is an inline filter attached to the fuel line, inside the frame rail on the drivers side, aprox under the drivers seat area.
Start with changing the fuel filter.
Probly under the drivers door on the inside of the frame.
It is inside of the fuel tank.
In 2005 Chevy started putting the fuel filter inside of the fuel tank. You will have to remove the fuel tank to service it.
on the inside of the frame,approx 2 ft. in front of the tank
my 1997 Chevy k1500 well run fine and then it trips fuel pump relay
Most likely it's the fuel pump, but check the fuel filter first, it may be plugged up.
Under the vehicle, behind the driver.
How is the easiest way to change a fuel pump on my k1500 Chevy pickup
2005 5.3 chevy pickup
the fuel filter is a in-line filter under the driver side frame.
inside frame , drivers side