Hi, I have a 2003 Impala base model 3.4 the blower motor has been making a squeaking noise on low speed and makes a vibration on high speed so I knew the blower motor was going to need to be replaced soon anyway but this is the first time I've shut the car off and taken the key out and had the blower motor keep running. I noticed that it wasn't shutting off when I drove home today from work. I went to go turn the fan setting to off and it decided to keep running. I figured it was going to shut off once I turned the car off but I was wrong. The other thing I noticed is there is a electric burning smell coming from somewhere and I'm assuming its coming from the blower motor. I ended up just unplugging the motor so it wouldn't kill my battery but while I was down there unplugging it i put my hand on the motor to see if it was hot and it wasn't so I'm totally baffled. Any thoughts? I might have a guy at my work check it out tomorrow but we will see.