Loud whining noise almost a howling noise coming from front passenger side gets worse the hotter the car gets

heater blower squirrel cage rubbing objects drawn in the cowl vent

wait, the passenger side! that's the accessory side including the power steering pump. check for low power steering fluid

Could it b ac moter

if its intermittent ,the a, c. pump only kicks in with air on and defrost, at heat it would be idle

Gina, That happened to my 2002 LeSabre also, after I got it back from the mechanic for another problem. It went away by itself after a while, but now I have intermittent blowing of the motor. The air blows cold, but the fan only blows occasionally. I'm getting that checked out soon with mechanic. Sorry, but I don't really know what caused the howling sound, but I know what you mean. I didn't notice it louder with the car hotter, just with the fan on high.

I would get the AC unit checked.

For people with this car/engine who have a seemingly impossible to locate squeal... This wasn't my first rodeo... I replaced the normal stuff. I spent $$$ and hours myself replacing the belt, tensioner, and water pump. This did not help. Important symptoms were: Loud squealing that seemed to get worse as engine warmed up; it stopped temporarily whenever I hit the accelerator; and when I removed the oil fill cap, there was a concerning amount of suction there. I assumed head gasket or rings was responsible. Turns out that ALL the above problems were the result of a single fucking o-ring!!! Look under your pcv valve (on the very top, passenger side of engine under the MAF sensor [turn black housing 1/4 rotation counter-clockwise to remove the entire assembly.]) I am willing to bet that underneath the little metal pcv-valve there is no seal where it contacts the engine. Mine had an orange o-ring on the black housing to seal where it contacts the engine, but the pcv valve itself had NO seal underneath. This causes vacuum from above to lift it from the engine slightly and results in the full brunt of the main intake channel being redirected into the oilpan area. I would have never guessed these could be related in any way. If all else fails and you are sure the pulleys and belt should be good, try this. You won't be dissapointed... less than $1 to replace that o-ring that the original mechanic didn't think it needed.