Is it normal for fuel pump to made a noise while running in 1999 Chevy Tahoe?

Yes, it is normal for the fuel pump in a 1999 Chevy Tahoe to make a noise while running. The fuel pump is responsible for supplying fuel to the engine, and it does this by creating pressure in the fuel line. This pressure is created by a rotating impeller that moves fuel from the tank to the engine. The impeller is driven by an electric motor, and the motor is what makes the noise. The noise is usually a high-pitched whine or buzz, and it is most noticeable when the engine is idling. The noise is not a cause for concern unless it suddenly changes or becomes louder than normal. If this happens, it is important to have the fuel pump checked by a qualified mechanic.