What is this part ?

[1500z71]

What is this part? Just fell off near the gas pedal area going down the road in my '92 350 5.7. I posted in the stupid interior threads forum but I'm getting kind of nervous as to what this piece may do and should like to fix it asap. Thanks fellas

 

[east302]

Looks like a linkage that goes on your a/c damper actuators. Look at the ac box to the right of the gas pedal.




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[east302]

Here you go, see thread below for pictures of where everything goes

http://www.gmt400.com/threads/no-air-on-driver-vent-only.30762/


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[90halfton]

Believe it's the linkage that controls which path air takes after the heater/ ac box. Mine fell off before too

 

[1500z71]

Thanks guys thats exactly what I was looking for just didn't have a clue what to search for.

 

[1500z71]

Thanks guys thats exactly what I was looking for just didn't have a clue what to search for.

My air free flows all the time, even when it's off. Could this be related to that problem?

 

[east302]

Maybe. If the blower doesn't shut off then that probably does not involve the linkages. If the air flow doesn't respond to the dash selection (panel, mix or defrost) then that is often a damper door out of position which could be a linkage issue.


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[1500z71]

Maybe. If the blower doesn't shut off then that probably does not involve the linkages. If the air flow doesn't respond to the dash selection (panel, mix or defrost) then that is often a damper door out of position which could be a linkage issue.


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Well this may sound weird but if its off it will fluctuate with the the vehicle speed, moving = hot air flow, idle = no air flow. I've even gone through a car wash and when the big air vents dried it off I felt an increase in air flow in the cabin with it off. Defrost and feet work, but in any combination of the two air will be coming out of the dash (face) vents no matter where you've selected. For example if it's on feet and defrost, it'll blow all three locations, just feet- feet and dash, defrost- defrost and dash.

 

[east302]

The varied flow with defrost sounds like the damper isn't adjusting correctly...replace the linkage and that will probably fix that. Not sure about the other, but it could be the same issue and be a damper that isn't holding closed tightly and allowing air to seep by.

The missing linkage is probably the cause of all of it.


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[1500z71]

The varied flow with defrost sounds like the damper isn't adjusting correctly...replace the linkage and that will probably fix that. Not sure about the other, but it could be the same issue and be a damper that isn't holding closed tightly and allowing air to seep by.

The missing linkage is probably the cause of all of it.


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Thanks man. I'll tackle it this weekend and let you know if it fixes anything.