i have a 2001 monte ls 3400. when i am driving the car it makes a revving typ noise secondary to the normal sound when accelerating. it shifts ok so i dont think its the tranny. it almost sounds like it is tied to a pulley somehow. could it be a uv joint? the serpentine belt is new.when car is in gear and i put it in neutral and hit the pedal it makes the nois as well. but not when the car is parked?? please help i am baffled???

 

Is it a whining noise you are hearing? Not quite sure what you mean by reving noise.

 

its not like a belt whining noise but more of a humming type noise

 

anything hindering performance? or just a noise?

 

it seems to lag a bit

 

well considering it does it when you not driving then i doubt its the u-joint. how long ago did u replace the belt? the new belt will b alot tighter than the old one and the pulleys may not be used to the extra pressure. did u spray some lube on the pulleys when u replaced it?

 

it only does it when i am driving. or when i am driving and i put it neutral it still does it as well? belt seems tight

 

it has 62000 miles

 

would lag mean anything?