2002 express auto 5.7 engine 82,00 mi.. It has a huming noise coming from the passenger side. It does not change pitch or volumn at any time. Ideling, in gear, in neutral or driving it stays the same. It is hard to pin point where it is coming from. Tranmission shifts without a problem, no leaks anywhere.
Any input would be appreciated.

thanks,
SH

 

Does it occur with the key on & engine off?

Random thoughts that probably aren't it:

Fuel pump isn't on that side but I've heard vehicles where the fuel pump was resonating thru the tank & you could hear it 'hum' thru the floorboard.

Could it be coming from the speaker on that side?

Any change with the air conditioning or heating controls?

 

try turning the radio off and see if it goes away.