Is there such a thing as a high volume heater/AC blower motor and squirrel cage fan? It seems like mine just has had the volume needed for the last two or three times I have replaced it. It is time again as it is starting to rattle.

Thanks....

 

try to find an original GM motor in good working order instead of parts store china junk.If you can fabricate/modify,you could get a higher power blower motor for a truck cab or the like,make mounting plate,get suitable squirrel cage,and mount that in-many of those truck blower motors are ball bearing.Also check the evaporator(AC core) screen to make sure it is not plugged with airborne debris

 

A little late in response, but it is also possible the seals to your ac ducts are letting air seep out. This will reduce air flow.