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Knocking noise under dash

4 messages,  Last post on Nov 01, 2009 at 6:54 PM

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#1 of 4 Knocking noise under dash by robert220 May 18, 2009 (2:02 pm)
I have 2006 impala, when running the air after i turn off the car i hear a knocking noise under the passenger side dash, any ideas what it could be. Replies to this message: djf5 (Sep 16, 2009 6:08 pm)
#2 of 4 Buzzing under the dash by tschutz May 21, 2009 (11:23 pm)
When it is damp outside, my 2007 Chevy Impala when you use the signal lights it has a buzzing sound under the dash each time the signal light flashes, it does it right or left.
#3 of 4 Re: Knocking noise under dash [robert220] by djf5 Sep 16, 2009 (6:08 pm)
Replying to: robert220 (May 18, 2009 2:02 pm) I have a 2007 Impala and after turning off a/c, knocking noise for about 30-45 seconds. I looked behind the glove box and saw this white box going up and down after turning off the a/c. Repair shop said it's an Actuator that's tied into the lend door that controls the air/heat. Got it repaired w/ parts/labor for $200. Hope this helps.
#4 of 4 clicking/clunking of air conditioner 2007 impala LT by pooadrid Nov 01, 2009 (6:54 pm)
I have a 2007 Impala and after turning off or turning the a/c, knocking noise for about 30-45 seconds or more. i opened up the glove box and removed some papers that were blocking the air flow.   And of course this noise only happens every now and then but when it does. wow is it annoying.   so of course when i finished cleaning out that area it didnt make any noises. which i figured that fixed the problem....but it didnt.   it continues again. and this sound shifts from driver side to passenger side. sometimes though.   so what should i do?

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