Diagram on 1997GMC Fuel Pump Installation or how to

Look on the cross member in the front of the radiator on the driver side and there should be a drawing there. Hope this helps.

Is this for replacing an existing relay or are you trying to wire in a new relay for something custom?

no never on GM

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.

REMOVAL & INSTALLATION
CAUTION
Fuel injection systems remain under
pressure, even after the engine has been turned OFF. The fuel system pressure
must be relieved before disconnecting any fuel lines. Failure to do so may
result in fire and/or personal injury.

1. If equipped with air suspension, the air suspension switch, located on a
   side panel of the trunk compartment, must be turned to the OFF position
   before raising the vehicle.
   
2. Disconnect the negative battery cable.
   
3. Relieve fuel system pressure using the recommended procedure.
   
4. Raise and safely support the vehicle.
   
5. Remove the fuel tank from the vehicle and place on a suitable work bench.
   
6. Remove any dirt that has accumulated around the fuel pump retaining flange
   so it will not enter the tank during pump removal and installation.
   
7. On 1988-94 models, turn the fuel pump locking ring counterclockwise and
   remove the locking ring.
   
8. On 1995-00 models, remove the retaining bolts around the perimeter of the
   fuel pump module.
   
9. Remove the fuel pump/sending unit assembly. Remove and discard the seal
   ring.
   To install:
   
   
10. Clean the fuel pump mounting flange, fuel tank mounting surface and seal
    ring groove.
    
11. Apply a light coating of grease on a new seal ring to hold it in place
    during assembly and install it in the seal ring groove.
    
12. Install the fuel pump/sending unit assembly carefully to ensure the filter
    is not damaged. Make sure the locating keys are in the keyways and the seal ring
    remains in the groove.
    
13. Hold the pump assembly in place and install the locking ring finger-tight.
    Make sure all the locking tabs are under the tank lock ring tabs.
    
14. Rotate the locking ring clockwise until the ring is against the stops.
    
15. Install the fuel tank into the vehicle.
    
16. Lower the vehicle.
    
17. If equipped with air suspension, turn the air suspension switch to the
    ON position.
    
18. Add a minimum of 10 gallons of fuel to the tank and check for leaks.
    
19. Reconnect the negative battery cable.
    
20. Turn the ignition switch to the RUN position several times to
    pressurize the fuel system. Check for fuel leaks and correct as necessary.
    
21. Start the engine and check for leaks.
    
22. Road test the vehicle and check for proper operation.
    
    
    
    
    
    Fig. 1: The fuel pump is located in the fuel tank. On some
    models it can be viewed from the side as shown here
    
    
    
    
    
    
    
    Fig. 2: Electric fuel pump removal
    
    
    
    
    
    
    
    Fig. 3: Fuel pump locking ring installation
    
    

sounds like a fuel pump problem. take off gas cap and have someone sit in the truck and turn iginition key to on. (do not turn key as if you were starting but to "on only") you should hear the fuel pump engage. if you dont hear the fuel pump then check the fuel pump relay. it is located behind the glove compartment. hope this helps...

I had the same problem no heat when all else fails check your water pump! It caused my heater not to work!

I apologize for not being able to provide a diagram, and it's been a while since I've replaced a fuel pump in a Jeep like yours, however the fuel pump for that vehicle is located within the fuel tank. You will typically disconnect power from the battery,relieve the pressure from the fuel rail to the injectors. In most cases the test port on the fuel rail has a schrader valve "valve core" like a tire valve, which utilizing a rag to absorb excess fuel you can depress to relieve pressure. You will then have to detach the fuel filler tube and vent tube at the filler neck. With a floor jack supporting the tank ,there should be a couple of bolts holding either two straps around the tank or a large cover that covers and supports the tank itself ,that will need removal. Once you have removed these and you should be able to access the top of the tank. Bear in mind you don't put the fuel pump/sending unit wiring harness or the fuel and vent tubing under too much strain as you lower the tank. you should have enough room to disconnect this wiring and fuel tubing. the tubing will probably have a quick disconnect setup where it attaches to the pump assembly. Once you have the tank on the ground take a suitable (non sparking drift and hammer) to tap the retaining ring that holds the pump in the tank, around the openig to release it. The pump assembly will be spring loaded and the top may pop up out of the tank. Just be sure to protect yourself from any fuel that might spray up. To reinstall can be a slight chore sometimes, as the assembly is spring loaded. It usually goes in with just a slight amount of effort though. Remember to replace the fuel sock on the pump and o-ring seal around the top of the opening. You can purchase just the electric pump, but I'd recommend replacing the whole fuel pump assembly. It will cost more in parts, but longer part warranty and lesser chance of further damaging the assembly are the benefits. Naturally installation is the reverse of removal. I'd recommend a new fuel filter as well, or shortly thereafter. Chrysler factory replacement units recommend draining all the old fuel from the tank and replacing with new fuel (never done that, and with the price of gas, probably won't start) I have never seen an adverse effect from not doing so. I hope this posting has helped.