I think the blower is on it way out - when i turn it on, it sounds like a dirty fan and squeaks like mad.

Can these things be cleaned? Do I need a new one? And does anyone have instructions on getting it out?

 

Not sure what year you're working on, but based on the '86 system I have in mine, it's one of the easier things to get to. Just a few screws, one wire to disconnect to get it out. It's under the hood on the passenger side, rear of the engine compartment. The motors are less than $30 - check www.partsamerica.com, $27.49 minus 25% discount they're running right now.

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82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.