hey guys, i got my 01 blazer trailblazer finally, and it has a low hum/popping coming from the driver door, possibly from (im not sure what it is) there is what looks like a little speaker cover right above the door, behind which is some wiring, etc. any one have any idea?

 

This is not a speaker, but is the interior temp sensor for the HVAC system. If you can hear it, it may be clogged with dust/debris. Clean it out with some compressed air. THIS THREAD should help.

*Moving to 2nd Gen Tech*

 

Thanks, blazer forum kicks my @$$ every time with good, quick info.