I need a diagram for 1998 chevy tahoe fuel pump

If the battery is dying that quickly you need a new battery
On the Tahoe K series 5.7L the fuel pump relay is in the engine compartment to the rear of the engine control module, should be identified on the cover over the relays
https://fuse-box.info/chevrolet/chevrolet-tahoe-1995-1999-fuses-and-relay

https://scanneranswers.com/signs-of-a-bad-fuel-pump-relay/
https://easyautodiagnostics.com/gm/4.3L-5.0L-5.7L/testing-the-fuel-pump-relay-1

The fuel pump assembly consists of fuel pump relay,fuel sensor,the fuel pump controlling fuse,its ECM B fuse. The fuel pump and oil pressure switch. ----------- For its wiring diagram, click the link below and refer the diagram:--- http://technoanswers.blogspot.com/2011/10/fuel-pump-wiring-diagram-for-1998-chevy.html ----------- This should help.Thanks.Helpmech.

fuel pump or fuel pressure regulator. When you turn the key do you hear fuel pump run? If not odds are the pump is bad.

Dark green provides power to fuel pump relay from the ECU. Orange wire at fuel pump relay is power at all time and is provide from the ECM/Bat Fuse at fuse block (Left side of dash). It also connects to the fuel pump oil pressure switch. The grey wire at relay provides power to the fuel pump and fuel pum oil pressure switch. The red plug thats tape to harness from relay/fuse center is the prime connector..

Take your vin number to any Chevy Dealer's Parts Counter. They can pull up the parts diagram and give you a part number. The ring is most likely a dealer part. So you will need to go to the dealer anyway to buy this part.

Fuel filter or fuel pump.

Your fuel pump is located inside your fuel tank. You need to drain and remove the fuel tank to replace it.

to remove the fuel pump you mus lower the fuel tank there ae two bolts on the back of the tank spray with wd 40 and use deep well socket 9/16 or 5/8 socket first lossen fuel hose clamp and over fill tube then unscrew the two bolts holding tank to vechicle, use a floor jack and a piece of plywood to lower the tank downone you have the tank on the ground tap the lock ring counter clockwise the tubes and wires come out of the center of the lock ring, tap it with a old wood chisel on two oppiste sides to get it to move once the ring is lose lift the fuel pump amd fuel sending unit out of the tank, replace fuel sock and o-ring on tank lube the o ring before installation and install in reverse proceedure replace main fuel filter, pull tank out and make sure there is no **** in the tank clen if there is. check the pickup tube for cracks. and put it back together and your set to go.

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.