Cannot find reset switch and no fuel to rail??? pump is working??

Check the fuel pump relay switch. According to a post on the Ford Truck Enthusiasts Forums, the fuel pump relay switch is located under the PDB (Power Distribution Box) . You may need to refer to the wiring diagram to locate it. If you don't have one, you can request it from the same post.

Check the fuel pump cutoff switch. This switch is located behind the firewall and is designed to shut off the fuel supply in case of an accident .

Check the fuel rail pressure regulator. If the fuel pump and the fuel cutoff switch are working fine, then the problem might be with the fuel rail pressure regulator. This is a small can mounted inline with the fuel rail with a vacuum hose attached to a hose barb on top of the unit .

When you turn the key on the fuel pump should pump for about five to ten seconds. Do this a few times and it should start. Even with a full tank the pump will do this to pressurize the system. If the pump keeps running it's not picking up fuel. Have a friend listen at the gas cap with the cap removed for the pump to cycle. If it doesn't work there is a fitting on the fuel rail that looks like a valve on a tire. Take the cap off of it and use a small screwdriver to push the center in and see if there is pressure in the fuel rail. Have the key on and wear safety glasses.You should get a squirt of fuel out of it. If you have no pressure there the pump could be bad or the filter plugged. If there is pressure you have other problems. There is no shut off switch. Only fuses and a fuel pump relay. https://www.google.com/search?client=ms-android-samsung&source=android-browser&ei=_skGWP71NoOFmwGwvp-YCw&q=1998+buick+lesabre+fuel+pump+switch+location&oq=+1998+Buick+le+sabre+fuel+pump+switch+location&gs_l=mobile-gws-serp.1.0.30i10k1.20246.66235.0.71699.52.41.2.0.0.0.354.6560.4j26j8j2.40.0....0...1.1.64.mobile-gws-serp..17.35.5853...0i10k1j0i7i10i30k1j0i13k1j33i21k1j33i160k1.pAvwOOuWlKU#imgrc=99du9RTFFGCYhM%3A&scso=uid_WAbKSQAIdFcKJtQCGQCAqw_8:0

Check to make sure the fuel pump is working. If the fuel pump is not working check the fuel pump fuse and fuel pump relay, also check to make sure the inertia cut off switch hasn't been tripped. If the fuel pump is working then check the fuel pressure regulator.

By fuel reset do you mean inertia fuel cut off switch ? Why did you change the fuel pump ? Are you aware of the fuel pump driver module ! Your vehicle has a electronic returnless fuel system . It is computer controlled , has a fuel rail pressure an temp. sensor .
The FRPT sensor measures the pressure and temperature of the fuel in the fuel rail and sends these signals to the PCM. The sensor uses the intake manifold vacuum as a reference to determine the pressure difference between the fuel rail and the intake manifold. The relationship between fuel pressure and fuel temperature is used to determine the possible presence of fuel vapor in the fuel rail. Both pressure and temperature signals are used to control the speed of the fuel pump. The speed of the fuel pump sustains fuel rail pressure which preserves fuel in its liquid state. The dynamic range of the fuel injectors increase because of the higher rail pressure, which allows the injector pulse width to decrease.
Inertia Fuel Shutoff (IFS) Switch The IFS switch is used in conjunction with the electric fuel pump. The purpose of the IFS switch is to shutoff the fuel pump if a collision occurs. It consists of a steel ball held in place by a magnet. When a sharp impact occurs, the ball breaks loose from the magnet, rolls up a conical ramp and strikes a target plate which opens the electrical contacts of the switch and shuts off the electric fuel pump. Once the switch is open, it must be manually reset before restarting the vehicle. Refer to the Owner's Literature for the location of the IFS.
The FPDM receives a duty cycle signal from the PCM and controls the fuel pump operation in relation to this duty cycle. This results in variable speed fuel pump operation. The FPDM sends diagnostic information to the PCM on the fuel pump monitor circuit. For additional information on Fuel Pump Control and the Fuel Pump Monitor, refer to Fuel Systems in this section.
Electronic Returnless Fuel System (ERFS) The electronic returnless fuel system consists of a fuel tank with reservoir, the fuel pump, the fuel rail pressure (FRP) or fuel rail pressure temperature (FRPT) sensor, the fuel filter, the fuel supply line, the fuel rail temperature (FRT) sensor, the fuel rail, the fuel injectors, and a Schrader valve/pressure test point. For additional information on the fuel system components, refer to Engine Control Components in this section. Operation of the system is as follows:

1. The fuel delivery system is enabled during crank or running mode once the PCM receives a crankshaft position (CKP) sensor signal.

1. The fuel pump logic is defined in the fuel system control strategy and is executed by the PCM.

1. The PCM commands a duty cycle to the fuel pump driver module (FPDM).

1. The FPDM modulates the voltage to the fuel pump (FP) required to achieve the correct fuel pressure. Voltage for the fuel pump is supplied by the power relay or FPDM power supply relay. For additional information refer to Fuel Pump Control and Fuel Pump Monitor.

1. The fuel rail pressure (FRP) sensor provides the PCM with the current fuel rail pressure. The PCM uses this information to vary the duty cycle output to the FPDM to compensate for varying loads.

1. The fuel rail temperature (FRT) sensor measures the current fuel temperatures in the fuel rail. This information is used to vary the fuel pressure and avoid fuel system vaporization.

1. The fuel injector is a solenoid-operated valve that meters the fuel flow to each combustion cylinder. The fuel injector is opened and closed a constant number of times per crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open. The injector is normally closed and is operated by 12-volt VPWR from the power relay. The ground signal is controlled by the PCM.

1. A pressure test point valve (Schrader valve) is located on the fuel rail and is used to measure the fuel injector supply pressure for diagnostic procedures and repairs. On vehicles not equipped with a Schrader valve, use the Rotunda Fuel Pressure Test Kit 134-R0087 or equivalent.

1. There are 3 filtering or screening devices in the fuel delivery system. The intake sock is a fine, nylon mesh screen mounted on the intake side of the fuel pump. There is a fuel filter screen located at the fuel rail side of the fuel injector. The fuel filter assembly is located between the fuel pump and the pressure test point/Schrader valve.

1. The fuel pump (FP) module is a device that contains the fuel pump and the fuel sender assembly. The fuel pump is located inside the reservoir and supplies fuel through the fuel pump module manifold to the engine and the fuel pump module jet pump.

1. The inertia fuel shut-off (IFS) switch is used to de-energize the fuel delivery secondary circuit in the event of a collision. The IFS switch is a safety device that should only be reset after a thorough inspection of the vehicle following a collision.

Go to you tube , there are videos how this system works an to test it .

.Here's a picture of it.1999-2003 Reset Button location
The switch is located inside the jack storage compartment found at the right rear corner of the vehicle. Remove the cover and it is behind the thin "foam" covering inside the compartment towards the rear of the vehicle.

It has a red button on the top of the switch, make sure the button is fully depressed. If it is and the vehicle still won't start check fuel pressure at the rail (there is a port on the rail which is under the hood on the engine) with a fuel pressure gauge. If the pressure is ok (about 30 psi) the problem is most likely not fuel system related.
The emergency fuel pump cutoff switch, also known as the inertia switch, cuts power to the fuel pump in the event of an accident - even a slow speed one - any sudden "jolt" can trigger the switch.

there is no reset switch on the fuel pump , what is it doing if your car is not starting because of fuel problem you pump is bad , it is in the gas tank ,before you change it get your fuel pressure checked on the fuel rail this will tell you if it is good or not

Perhaps your fuel injectors are not opening properly to release the air pressure in the fuel rail and the fuel is unable to get in. With the vehicle off, remove the cap from the Schrader valve (the same kind of valve used on tires) in the fuel rail, then depress the pin in the center of the valve with a small screwdriver. CAUTION: this may be under high pressure (some vehicles have 90 PSI systems), and there probably will be gasoline in there. Make sure there are no ignition sources present (no smoking!) and wear safety glasses. If you get only air or nothing comes out, put the cap back on the valve and try to start the car one more time. If that doesn't work, your fuel pump was probably damaged when the tank went dry.

try resetting fuel pump safety switch behind passenger side kick panel .

fuel pump relay

with that switch tripped and you turn car over there will be very little to no fuel pressure in the rail.
after resetting switch does it constantly trip? if so you may need a switch try unplugging switch and use a jumper wire if that works i would say you need a switch