Air not coming out vents,defroster or at floor on 2001 chevy 1500 express van

SOURCE: All Air Conditioning blows our the defrost vents

Some thing you could look at would be this. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold.
With a cold engine,look for a skinny vacuum hose that runs from the intake toward the fire wall . It should be going inside the cab and connecting to the A/C vent control.Some times the hose becomes disconnected or splits or cracks due to heat under the hood.
Thats usually the trouble.
I hope this helps you.

SOURCE: 2000 chevy express 1500 van having starting issues

Start with fuel system. Listen for fuel pump humm at fuel tank No humm check wiring to pump for power. Then check for spark at plugs and wires. Remove wire from coil and hold near engine and see arch when you crank. No arch. Replace ignition Modular inside distributor cap or cap or rotor

SOURCE: ac wont come thru vent on 97 chevy blazer

Check the vac lines for leaks on the drivers side rear of the engine compartment. The ones going to the vac ball attached to the hood.

SOURCE: 2001 chevy express van 1500,

Inside the van, all the way to the rear, on the side, will have a nice looking panel over it, remove panel and you'll see blower motor, held on with about 6 small screw's.

SOURCE: my 1993 Chevy van won't shift pass 2nd gear

Rebuild the transmission. This is an issue with the TH700-R4 as well as the 4E60LE transmissions. Sorry but that is the only way.