GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 3 of 3
  1. #1

    Question Another Climate/Air Cond Question

    So I was going down the road tonight on a long super smooth patch, so everything was completely silent. Had the A/C set on 72 auto, nice and cool...and it was probably on one of the lowest settings...yet out of somewhere in the middle you could hear something not quite loud, but noticeable...a sort of pattern of clicking, like a fan slightly off balance tapping the side of the shroud, or something in the vent flickering from side to side....I inspected what I could and found nothing that would cause it...but it only comes about when the air flow is low...

    Does anyone else have this problem? Or maybe know exactly where to look to stop it? It sort of lowers the whole quality feel of the vehicle with a small tapping noise like that.

    '93 Pontiac Bonneville SE | Series I Buick 3800 L27 | Dark Yellow Green | 3.06:1 | | 225/60 TripleTreds 2/9/08 | 106k | The Mean Green Machine
    '04 Chevrolet Avalanche 1500 Z71 4x4 | Gen III Vortec 5300 LM7 | Summit White | 3.73:1 | XM, Bose 6 Disc Changer | 12-way Heated Leather | 58k

  2. #2


    might be the blend door motor. it has gears and if a tooth or two break you get the clicking. check the motor change to a defferent temp and see if the sound goes away...mike
    Michael Collins
    1993 4X4 Suburban
    many other toys as well

  3. #3


    Found the problem, it was the left passenger vent. Its door was clicking in the slider back and forth, ticking at just the right air speed...I put some thick dielectric grease in the slider and the hinges of it, and now its smooth, and always quiet!

    Simple. :D

Similar Threads

  1. dual climate control question
    By koko in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 0
    Last: 06-01-2010, 07:07 PM
  2. Replies: 0
    Last: 05-03-2010, 08:00 AM
  3. Replies: 0
    Last: 01-26-2010, 01:30 PM
  4. 1968 CHEVROLET C-30 ,DUMP TRUCK,,ex.cond!
    By ChevyFan in forum Chevy Trucks For Sale eBay
    Replies: 0
    Last: 07-12-2009, 09:30 PM
  5. Dual Zone Climate Question
    By biggiej42 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 3
    Last: 12-26-2008, 04:25 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts