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it could be your valves or your engine
Bearing in blower motor?
Not enough info. What kind of noise? Coming from where? Under what situation(s) does it occur?
Most common culprit is a slipping belt.
Loose Lug nuts bad control arm...
that could be a variety of things, wheel bearings, u joints, rear end...
The noise can be comming from the weather stripping around the door, the wind passing past the antenna or from the wind around the luggage rack on acceleration.
check the cadillidic converter under the car.
The clicking noise when you turn is probably one of your CV (constant velocity) joints - it's a mechanical coupling which transmits torque of a rotating shaft (e.g. a driveshaft) at an angle. A lot of cars made in the 90's have them near the front axle, which would sound like it was right under the drivers' seat.
Bad shock mount? Loose exhaust system?
It could be the transmission, it could be some parts under the vehicle that rub only when travelling forward.
Your girlfriend in the front seat. Hope this helps