97 tahoe LT super low air flow from vents

[TheAutumnWind]

Duct seals bad? They are foam and become dust over time iirc. Could be leaking air and losing pressure.

 

[Bobio2003]

Make sure there is no restriction to the incoming air, leaves, pine needles or other debris. If it can't draw air in, it can't blow it out. If yours has a cabin air filter, change it.

 

[liquify33]

Make sure there is no restriction to the incoming air, leaves, pine needles or other debris. If it can't draw air in, it can't blow it out. If yours has a cabin air filter, change it.

I *believe* the air is pulled from the cowl area. It might be good to pull up the passenger and possibly center sections and check for debris/clogs.
I used a small shop vac to get into the evaporator area and get leaves and pine needles out of mine.