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    Radio Display getting excessively hot 2008 Yukon Denali

    The radio display (stock Bose) on my 2008 Yukon Denali gets quite hot (about 120° F) whether or not the radio is playing. Front climate control display also get hot. The same is true of the rear climate control display even when the display is not on and the aux is off). The radio and CD player...
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    (deleted thread - wron section of forum)

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    08 Yukon Denali rear "Apsirator" buzzing. Really obnoxious.

    The aspirator in the headliner (the one in the rear, not the one over the driver's seat) is buzzing like a bee in a plastic cup. It's really annoying. The front aspirator was easy to replace then it was buzzing, but for the sake of my sanity, I can find no way to access and replace the rear...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    OH! I figured out what it was! It turned out to be a bad front wheel bearing. The banging was was the sound of the bearing in the hub assembly failing. At first, the failure was not bad enough to show any play in the front bearing. Yesterday I heard the distinct sound of a spun bearing, so we...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    I checked the rack and pinion and every other part known to man and God. Mechanics did also at great expense. No clue what it is causing this, but it sounds like something is going to let loose and bust when it happens. The only thing I know so far is that it got worse the instant I replaced...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    If I can get it to do it on queue. The best description is it sounds like someone beating on a steering knuckle with a hammer. Happens on turns and on the straight and lasts only for about a minute or two, and at random and then stops. It's almost like something is loading up and releasing. At...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    I had the entire truck gone over by a GMC dealer an they can't find a blessed thing wrong with it. The front stabilizer bar links were bad (bushings gone). Replaced them and the problem got worse. U Joints OK, the crossmember is ok. Transmission and transaxle OK. No problem can be found. The...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    I will try that. I did all the obvious checks and found nothing wrong with anything. But I will go over everything again just to see if I missed anything. I'm beginning to suspect some kind of intermittent issue with either the stabilitrack or ABS system. I'll do a computer scan in the morning...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    That was the first thing I tried. The AC was off at the time and even with the belt on, I can't get the vehicle to reproduce the same sounds. I checked the CV joints and everything for looseness and wear and can't figure it out (mainly because this has happened just once), but I will go over all...
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    Jackhammer sounds from under front end and other horrible noises - 2008 Yukon Denali

    OK, let me give you the progression of this jackhammer sound coming from under my the front end of my 2008 Yukon Denali (170K miles, well taken cared of, checked out and completely serviced not one month ago): About a week ago, I was driving along and heard what sounded like a cross between a...
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    2008 Yukon - No lights/display on climate control, stuck on AC, buttons unresponsive

    I've got a strange problem here. 2008 Yukon Denali. I've got no button lights or display for the climate control. Buttons unresponsive, stuck on AC presumably at what it was last set at. The light on the parking assist button is stuck on. Now here's where it gets bizarre: The interior lights...
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    2008 Yukon Denali AC issue: Is there a way to clean dust and debris of the evaporator? (AC acting screwy)

    Did that. Replaced the AC controller after tearing the whole dashboard, etc., apart. All the actuators are working as they should. Did that too. Reset the climate control. Did nothing. Replaced both aspirators in the head liner and nothing. Still does the same exact thing. I measured the...
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    2008 Yukon Denali AC issue: Is there a way to clean dust and debris of the evaporator? (AC acting screwy)

    Tried that, doesn't work, can't get to the rear aspirator without disassembling the entire vehicle. Had the whole system check and nothing can be found wrong with the system. The evaporator in the heater box is absolutely pristine clean. There are no error codes, the air mix doors are fine...
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    2008 Yukon Denali AC issue: Is there a way to clean dust and debris of the evaporator? (AC acting screwy)

    That's exactly what I was thinking! The aspirator(s) (one in front and one for the back) are also another possible issue. The one in the back started making a really nasty buzzing sound due to the bearings in the tiny little fan being crappy in design. Getting to it to replace it is going to be...
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    2008 Yukon Denali AC issue: Is there a way to clean dust and debris of the evaporator? (AC acting screwy)

    Is there any way to get at the evaporator on the AC system in a 2008 Yukon Denali to remove dust and debris without tearing the whole dash out of it? Here's the issue. AC system was serviced, performed fine for several months. No leaks for coolant to get out, etc. Everything is fine. Compressor...

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