My '95 Blazer, when it's taking off (10-15mph) sounds like it's sucking air through the airbox like crazy then all of a sudden it stops. It doesn't run bad but it's annoying. I've never really experienced this with any other vehicle I've owned. Could there be a potential problem here?Any ideas what that could be? The strange part is that it doesn't do it all the time but I haven't figured out a pattern of when it does or doesn't.

 

That would be the sound of the fan, it does get loud when the fan clutch is engaged all the way, mine does the same.