when i turn on the rear ac/heat (doesn't matter which), the blower (i'm assuming, located on drivers side, behind back couch seat) is really loud in the back and blows very little through the vents. What is causing this and how can i fix it?

pam

 

I'm thinking it needs lubrication
I used WD40

 

is this a new condition or has it been this way before, my van had a similar situation of little air flow and it turned out to be a mouse nest in my ducts just above the blower . either way you got to pull he fan and take a look .

good luck , let us know what you find

 

Good one.
What kind of noise?

 

its actually a hum. its softer at the 2nd notch speed and by the last or fastest speed, its a loud, consistent hum. definitely not suppose to hear it!