I have a 2000 4wd 4door Chevy Blazer with a 4.3l engine. Last winter I herd a pop sound from under the dash, I no longer get any heat to the feet, the heater works fine (blowing at me and defogger). I recently checked under the IP (instrument panel) on the driver’s side and found the actuator for the vent in question, it looks like the shaft is broken.

- Is there a procedure for replacing just the shaft or do I have to replace the entire heater/vent unit (not sure what it is called)?
- Does the IP have to be removed?
- Is there a manual, which describes in detail how to replace the parts in question?

Thanks in advance....
DaveAA2

I have a 2000 4wd 4door Chevy Blazer with a 4.3l engine. Last winter I herd a pop sound from under the dash, I no longer get any heat to the feet, the heater works fine (blowing at me and defogger). I recently checked under the IP (instrument panel) on the driver’s side and found the actuator for the vent in question, it looks like the shaft is broken.

- Is there a procedure for replacing just the shaft or do I have to replace the entire heater/vent unit (not sure what it is called)?
- Does the IP have to be removed?
- Is there a manual, which describes in detail how to replace the parts in question?

Thanks in advance....
DaveAA2

I have the same problem but 2001 Blazer. I didn't hear pop, it happened when wife was driving. I did not see any responses to this previous post. I need help just locating vacum hoses to see if that is it. Most post with similar problems have vacum hoses traced to see if they are off.
Help feet are freezing, I have a hour drive to work everyday
Joe

everything is run by vaccume line there its 99% that