Drivers Side Cab Vent

[RMBLFSH]

1972 Cheyenne Super, Factory A/C truck:

In the drivers side kick panel, there is a door that appears to be operated by a knob that you pull on, to allow outside "fresh" air into the cab.

I can pull the knob, but the door moves very little, and certainly does not appear to open enough to let any air in.

What am I doing wrong, or how does it work?

Thanks,

Rich

[SS Tim]

Its the kick panel vent. They are manually operated, pull the knob aft to open. On A/C trucks the right vent is used for outside air introduction during blend operation. If it is sticking/stiff it might be rusty from non-use or there could be a lot of debris down inside blocking it. Either way take a look and lube the moving parts then see what happens. Might have to pull it apart to make it work. If you don't have one it would be a good idea to buy a driver's handbook (owners manual) in addition to the factory service manuals.

[LockDoc]

-
To add to what Tim said, the vent should open 90º.

LockDoc

[RenoKeene]

There are spring loaded detent pins that hold these in, take the pull handle lose and open the vent by hand and you'll see the pin.

[TxTan]

I recently had the same problem. Remove the vent, clean everything, and reinstall where the vent will open from the front of the cab, not from the rear.

[RMBLFSH]

Thanks all, I followed your instructions, it now works perfectly.