Most common culprit is a slipping belt.
check your wheel bearings
The most common cause is slipping belt
A worn belt will cause a squealing noise. The squealing noise is caused when the belt slips. Tightening the belt will temporarily fix the problem.
Bad belt. Worn tensioner. Bad compressor.
Its almost sounds like a dolphin noise.
The belt has worn on the edges and creates friction which causes squealing. Also, sometimes when a belt is cold it will squeal.
It could be the transmission, it could be some parts under the vehicle that rub only when travelling forward.
A Geo Metro is a front wheel drive vehicle. When a squealing noise occurs when the wheel is turning, it can be an indication of damage to the CV joints.
Check for a slipping drive belt between encine crank pulley and AC compressor pulley.
The noise a pig makes when it is angry or hurt.
The squealing sound you hear when your car brakes are wearing out is referred to as a "squealer." This indicator is a strip of metal that when the brake pad wears down makes contact with the rotor making a metal on metal noise.
sounds like the door check has worn out