I have a 97 Tahoe that doesn't divert air through the vents properly. I've checked out what I can and found that the vent doors in the upper air box under the dash has come apart. The actuators are fine.

So, my question, is there a place where I can find a R&R procedure to replace the upper air box? I don't bend in the right places and my hands can't get where they need to be to disassemble this nightmare. I don't know if I have to remove the entire dash or if there is a trick I can't see to getting the air boxes out.

Thanks for any help you can send my way.