GMC Repair: 2005 GMC Envoy, fan clutch, gmc envoy

Question
I have a 2005 GMC Envoy and recently it started to have a hum when started and gets a little louder as I accelerate. When I take my foot off the gas as I am in motion the humming stops do you know what this might be?

Answer
Hi
If it is coming from the front of the engine it is PROBABALLY either the idler pulley (VERY COMMON) or the Water pump (Somewhat common). It MAY also be the Fan Clutch (EV Clutch). If it is the fan clutch, it will be pretty quite after vehicle gets warm to hot. In other words it will be louder and more pronounced cold.

If it is coming from another area of vehicle, please let me know and I'll be MORE than happy to assist.
Follow post back, if needed.
Good luck
Pawl