need specific guidance on my no heat problem
 

it's getting colder and I have little heat from the vents. the black box under the glove box is very hot.

can someone guide me to or post a picture of the actuator valve? Better get could someone post a schematic of what controls the fresh air door? I am getting tepid air from the vents after warm up. with the black box hot I am assuming the door is partially open and if closed I would get hotter air into the vent system.

RE: need specific guidance on my no heat problem
 

This is what it looks like...the actuator.

http://www.dormanproducts.com/images...p1/604-100.jpg
I haven't been able to find an "in vehicle" photo.

RE: need specific guidance on my no heat problem
 

I plan to take the glove box off this weekend to find this thing. is it in or onthe large black box that I can feel as very hot?

RE: need specific guidance on my no heat problem
 

From the info I was able to find it is outside the box. There were hints to the location being behind the center console. I don't really have a direction to point you in for a search. I tried everything from "actuator" to "air blend door actuator, silverado" in a google search without much luck.
Auto Zone or Discount may have a diagram on thier in store computers.

RE: need specific guidance on my no heat problem
 

thanks for your help. I'll do just that.

RE: need specific guidance on my no heat problem
 

heres what you got to do- lay on your back on the floor on the passenger side- in front of where the middle seat or console is at look right under the dash- now you see the pic they posted for you it looks exactly like that- i would check the conection to make sure its not lose- had the same prob the damn connector was lose- good luck

RE: need specific guidance on my no heat problem
 

there are 4 of those...left and right temps...mode,and fresh-air....only 1 is fairly accessible

RE: need specific guidance on my no heat problem
 

so is this something I may want to punt to the dealer?

RE: need specific guidance on my no heat problem
 

you have no heat on BOTH sides?

RE: need specific guidance on my no heat problem
 

when the truck has been driven and up to temperature there is a cool-warm feeling to the air coming from all vents. It appears to be equal throughout each vent.

RE: need specific guidance on my no heat problem
 

if its all vents,I'd look elsewhere...make saure both hoses are hot...make sure its not low of coolant

RE: need specific guidance on my no heat problem
 

I check that last week. both hoses are hot and the coolant reservior is correct.

RE: need specific guidance on my no heat problem
 

ok...I'd say it may be dealer time...it needs to be checked for codes...and pretty much only a gm tech2 scanner will "talk" to the hvac module.

RE: need specific guidance on my no heat problem
 

had the same problem found out that my heater core had fallen out of the clip that holds it in and the air was actually blowing over the top of the heater coil