I have heater problems in my 2001 Alero, on 2001 Oldsmobile Alero

When I turn the heater on low it blows out a little bit of heat but if I turn it up to medium or high, it makes a real loud noise and almost shakes the car. Please advise.

Asked by for the 2001 Oldsmobile Alero
Pull the blower motor and remove what the rodent left in there. Your blower wheel is not balanced.
1 more answer , 2 more comments
blower motor or fan blades are bad
Greg come to the Midwest and see what we pull out of blower wheels, AINT PRETTY.
Ewww, happens here in Pa a lot too. Can be a pretty disgusting repair to have to perform.