I'm not sure what to call it.....but in the area below the windshield, where the fan intake and exhaust screens are.......this area in question; my passenger side blows air when the blower is on so I assume this is excess air exhaust, the driver side must be intake? I guess my question is should it blow air our when the blower fan is on? I would just as soon have any excess air blowing inside the car as it seems my AC outlets blow a little weak compared to a new vehicle. Any thoughts?

If I understand correctly, it sounds like your flaps inside the heater box might not be moving properly, or sealed properly.  There are seal kits, and vacuum line kits for cars with AC.  You might also have a vacuum actuator not functioning.

Good luck
Larry

Larry,

AC Plus,

Take your blower motor out and compare it to the Blazer one see if the mounting/housing is the same and that the cage fins are cupped in the same direction...and MAKE sure that the motors go in the same direction. the spacer I mentioned goes between the motor and the heater box, to keep the motor about 3/4" out so that the cage doesn't bottom out, get some good press board and a jig saw and cut the shape of the blower motor housing where the motor mounts to the heater box, and then a round inside circle for the cage to go through...MAKE sure that nothing rubs or is to close.

acplus is right about using other GM blowers for Sharks. Most people have adapted the later, C4 blowers to use in Sharks, with the spacer, for the same reason. Waaay more air volume, as the squirrel cage is wider, and the fins on them are angled to provide more air volume, at the same blower speeds. The only issue is the cage is about 3/4" wider than the cages on a Shark, therefore you need some way to space the whole assy out a little.

Her is a link on info for changing the blower, I did mine and it works great. fp_vetter722008-07-14 03:20:32

http://home.comcast.net/~chadwick.ro...entilation.htm sorry try this one.

Nice info, Fred!