Have a 98 Chevrolet Tahoe-has a humming noise all the time-likle a pulley-pulley changed- you have been told fuel oumps on these models always hum- is that true?

Yes, it's common for fuel pumps in older models like the 1998 Chevrolet Tahoe to produce a humming noise as they operate. This sound can be normal, especially if the pump is functioning properly and the noise hasn't changed in intensity. However, if the humming has increased or is accompanied by performance issues, it might indicate a problem that needs further investigation. Always consider consulting a mechanic for a thorough assessment.