tapping noise under dash - Page 2 - Chevy Impala Forums
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post #16 of (permalink) Old 11-11-2018
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My problem was the Passenger heat actuator.
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Nothing custom about this.....LOL
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post #17 of (permalink) Old 03-23-2019
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Replaced all three actuators on my 2012 LTZ

It was a horrible noise, drove me up the wall. I replaced the one above the glove box on the passenger side (not terrible but had to pretty much do it blind because I could not see it after I had my hand in there. Took about a 1/2 hour. I paid a friend who does car work $40 to replace the two above and inboard of the gas pedal.

Really hoping the 9th gen Impala's do not have this same problem. Been in the back of my mind ever since I bought my 2014.
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Anything worth doing is worth doing right!

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post #18 of (permalink) Old 03-23-2019
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Ed, iirc, with dual climate control, there are 3 hvac actuators in the pass. glovebox area: rh temp, mode (vent) and recirc. Only actuator between the steering wheel and radio is the lh temp. All are the same part# except the mode (vent) actuator. Looking into the glovebox opening, rh temp is on the left, mode (vent) is atop the rh temp and the recirc is top right behind a large wiring harness. Lh temp is up under the dash between the steering wheel and radio accessed by removing black plastic kick shield. I've had to replace both temp actuators. 5.5mm (7/32"). $15/ea. on Amazon. Dorman part# 604-108.
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Last edited by sheila; 03-23-2019 at 12:10 PM.
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post #19 of (permalink) Old 03-23-2019
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Quote:
Originally Posted by sheila View Post
Ed, iirc, with dual climate control, there are 3 hvac actuators in the pass. glovebox area: rh temp, mode (vent) and recirc. Only actuator between the steering wheel and radio is the lh temp. All are the same part# except the mode (vent) actuator. Looking into the glovebox opening, rh temp is on the left, mode (vent) is atop the rh temp and the recirc is top right behind a large wiring harness. Lh temp is up under the dash between the steering wheel and radio accessed by removing black plastic kick shield. I've had to replace both temp actuators. 5.5mm (7/32").

Sheila, you had to replace yours on a 9th gen? (2014-present body style)



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post #20 of (permalink) Old 03-23-2019
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Sorry Ed, 8th gen., '12 LT. Also had to replace the rh (pass.) temp actuator on son's '16 LT Limited (old body style). All 3 temp actuators were $15/ea. on Amazon.
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post #21 of (permalink) Old 03-24-2019
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Well don't feel too bad about $340.00 to replace all 3 actuators. Some knucklehead here wanted $450.00. Needless he's still waiting.
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post #22 of (permalink) Old 03-25-2019
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i paid in the 300 dollar range i think for the two blend door actuators on the temp control. i bought the parts but didn't feel like standing on my head to change them...i felt the annoying clicking going away was worth that price lol.
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post #23 of (permalink) Old 2 Weeks Ago
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You can check out blenddoor.com to purchase an alternate gear ($19) that the vendor claims is superior to the original gear that fails.

For my recent drivers side actuator failure, I purchased a new Dorman 604-108 actuator, opened it up, removed that gear that eventually fails and installed the blenddoor.com gear instead. Also lubricated it with the synthetic grease that comes with the gear. Although I could have just put the new gear in the old actuator, the whole actuator is cheap enough to replace.

Note that several models are sold on blenddoor.com so select the correct part. For my 2007 LT only the rebuilt kit that has a "larger gear on top of a smaller gear" will work. The aluminum gear, the white Delrin gear, and the black single gear (not "stacked") won't fit for my 2007. I don't know what year GM made the change where the gear (that fails) is pressed onto the shaft rather than manufactured as one piece.

Last edited by Lettermark; 2 Weeks Ago at 08:23 PM.
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