blower motor volume

does anyone know if there is an aftermarket blower for a 1993 suburban that blows more volume than stock? or if theres an issue,sounds like its blowing good but weak out the vents. thanks for any help

Check for stuff blocking the air flow, like leaves, plastic bags, evaporator leak (oil mixed with dirt). Or is most of the air being diverted elsewhere, like near the windshield, under dash?