I just replaced my fuel tank in my 95tahoe now it will not start

That sounds like your timing belt.

There isn't one. You either make one yourself or lower the gas tank. See the link for guidance on lowering the tank and replacing the fuel pump.

06 Chevy Tahoe remove gas tank and replace fuel pump step by step

i would first try to replace the fuel filter.usually there filter accumalates debris in the gas tank especially if you you ru the tank close to empty.filter location needs to be traced from the tank toward the motor.you will see a cylinder inline with a strap.part usually runs around 20.00. also when you initally turn the key before start you will hear a hum for about 2 sec. this is the fuel pump pushing the fuel up to motor.so if you hear this pump is working.

Computer showing any codes? Could be a bad regulator or a leak in the system allowing air in and fuel to flow back to the gas tank.

did you install the oil pressure switch origional to the tahoe? The tahoe uses a low oil pressure shutdown, instead of an inertia switch to shut off the fuel pump in the event of an accident. If the pressure circuit does not close within 3 seconds after the engine starts the fuel pump shuts off. This is in case the truck is on its side or upside down the pump will shut off.

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.

You need to take the fuel tank off the truck and remove the sending unit/fuel pump from the tank.

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

You have to Drop the Fuel tank for this. It is Mounted on the Top of the Fuel tank. Not an Easy Job.