1998 heater will not go to floor

When I turn the heat to go to the floor the defrost blows, I am having trouble even finding the cables that may be responsible for the damper.

The damper is vacume controlled.... You may have a leak in one of your octopus tubes.. Pull the controls and start vac tests. Also there is a main vac bulb under the dash that you may want to check.

When I have my heat set to the floor, I get some out of the defrost also.

If it is set to heat, I think it is normal.

When I have my heat set to the floor, I get some out of the defrost also.

If it is set to heat, I think it is normal.

I only get defrost no floor heat at all. I use to get heat on the floor from the engine almost all the time, and now I get nothing on the floor.

The damper is vacume controlled.... You may have a leak in one of your octopus tubes.. Pull the controls and start vac tests. Also there is a main vac bulb under the dash that you may want to check.do you have any idea where I might find the schematics for this system or even just a color chart for the hoses and wires under the dash?

Go to your local GM dealer, usually the service department will print them out for you...

Thank you so very much, you have been a huge help

No prob, let us know how it turns out

Save you the trip.

http://files.automotiveforums.com/gallery/watermark.php?file=/500/116754vacuum_diagram.jpg

(1) Recirculate Air Inlet Port
(2) Heat Port
(3) Heat Mode Port
(4) A/C Mode Port (Vent Mode Port with RPO C42)
(5) Defrost Port
(6) Source Vacuum Port
(7) Vacuum Hose - Blue
(8) Recirculation Actuator
(9) Vacuum Hose - Orange
(10) Vacuum Source
(11) Vacuum Hose - Black
(12) Rotary Vacuum (Mode) Switch
(13) Vacuum Hose - Yellow
(14) Vacuum Hose - Gray
(15) Heater Slave Valve Actuator
(16) Mode Actuator
(17) Vacuum Hose - Brown
(18) Vacuum Hose - Red
(19) Defroster Actuator

Here is one in color.

http://img199.exs.cx/img199/2231/vacuumdiagram2cu.jpg

If you didn't know already you just have to open the glove box (all the way) and it's right behind it. The one with the metal connector going towards the radio.