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  1. O

    HVAC fan grinding/surging

    Noticed the other day that the hvac fan in the cabin has been surging (high then low). It is more pronounced when the fan is turned up high. Today I noticed it is making a grinding noise as well. Any ideas where I should begin my search?
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    Best Yukon Denali upgrade?

    What do you all think the best upgrade for an 07-13 Yukon Denali XL is, interior wise and performance wise?
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    Can I just swap stock bulbs for LED?

    I want to swap my stock halogen lights for LED Lights. I also have the stock housings. Can this be done simply by using the included driver plug and play kits or is modification necessary for them to work properly? 08 Yukon XL Denali.
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    Best Aftermarket light housings for LED

    I am looking at switching my headlights to LED. My housings are cracked and beyond repair. What is the best housing to get for an LED application. I like the look of smoked housings and would like a more modern look. What do y’all recommend other than the MORIMOTO XB housings and lights?
  5. O

    What the heck is this thing?

    What is this doohickey and why does it make the most annoying vibrating sound ever all the time?
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    Squeal while braking/turning

    2008 Yukon xl Denali. I’ve got an annoying minor squeal when I initially apply braking pressure that quickly goes away after initial contact. It also squeals when driving around a corner to the left without braking. I haven’t noticed it when turning to the right. What should I be checking for...
  7. O

    One leak down, on to another…

    Well I finally got around to replacing my oil cooler block off plate that I suspected was leaking. Replaced it with a bullet block off plate that several of you recommended. Problem is I still have oil dripping onto my driveway. Not coming from oil pan, filter or block off plate. Maybe someone...
  8. O

    6.2 oil cooler block off plate

    Anyone know what block off plate an 08 6.2 uses? I’ve seen untold numbers of styles and I want to make sure I have the right one before I just take it off.
  9. O

    Second row passenger carpet soaked

    Cleaned the Yukon today and when I took the second row mat out (which was dry) I found the carpet was wet on the passenger side. I pulled the trim and didint notice any leaks or signs of leaks. The insulation underneath the carpet is totally saturated and the carpet smells like mildew but only...
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    Help me track down oil leak

    Hey all. Just noticed some oil stains on the driveway tonight. Just took some quick pics so I can share them with you guys. I will probably investigate more in the coming days. Anyways, has anyone had an oil leak from the areas in the pics? The pics are looking towards the front from behind the...
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    How much oil loss is bad?

    Changed my oil today. I went a ways over the regular minder, probably 1-2k. I’ve always gotten a full pan out of it when I drain the oil but today o only drained about 3ish quarts total. It’s never been that low. It doesn’t leak for sure. Is this something I should be concerned about? I don’t...
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    Rooftop cargo box bounce

    2008 yukon Denali xl with the factory roof rails that came with it. Picked up a Thule Force XT Cargo box. It’s the big one. When we drive down the road, it bounces up and down quite a bit to the point where it contacts the roof. This is with and without cargo in the box. Seems like it’s the roof...
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    Flushing coolant system. Best way?

    I’ve never flushed the coolant on my 08 6.2 Denali since I’ve owned it (5.5 years). Recently the heater hoses busted off and dumped a ton on the ground. I’m going to replace them and the upper/lower rad hoses and thermostat. Do I need to totally drain every last ounce of coolant out or can I...
  14. O

    Shifting “thunk”

    2008 Yukon Denali XL with around 160,000 on the clock. Often when shifting (usually when downshifting when getting on the throttle to pass on the freeway or when giving it throttle after slowing down) there is an audible and felt “thunk” as if it is being slammed into gear. Sometimes it does it...
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    Anyone have leaky door handles?

    Replaced the door handles on my 08 Yukon Denali XL and noticed the replacements don’t seat well against the door even with the gasket. Got these from 1a auto. Poured some water over the handle and could see water running down the inside of the door. I then tried it with one of my handles that...
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    Bleeding brakes, sucking air from Master cylinder?

    Just finished my brakes and rotors on my 08 Yukon XL Denali. I bled the back two calipers following the recommended order. Flushed the lines and got all the gunk out until fresh fluid was flowing. No issues with the rear. Filled the MC reservoir each time and kept it full. Then I did my front...
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    Bad brake grinding

    08 Yukon XL Denali. Replaced my brakes and rotors probably a year and a half ago with Duralast Gold Ceramic pads and corresponding rotors. I've noticed that my stops have been increasingly spongier. Several times I have noticed stops coming from down a hill have resulted in a really sharp...
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    Possible to lift 08' XL Denali?

    I would like to take my 08 XL Denali and make it more suitable for backcountry hunting. The issue lies in how low it sits to the ground and the lack of clearance it grants. Is there any way to lift it 1.5-2 inches with the AWD and auto leveling suspension in the back?
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    Yukon Denali 6.2 towing Travel Trailer

    Anyone on here tow a decent sized (23+) foot trailer with their Yukon? I’ve got a 2008 Yukon Denali XL and I’m trying to figure out if it’s feasible to tow a trailer with it. Sent from my iPhone using Tapatalk
  20. O

    Replacing Serpetine belt...which one

    I have a 2008 Denali with the 6.2. Will the belt used for the 5.3 and 6.0 fit this engine as well or is it a different size? Sent from my iPhone using Tapatalk
  21. O

    What rotors do you recommend?

    Replacing the rotors and brakes on my 2008 Yukon XL Denali. I want a beefy and solid rotor that will hold up to my family of 5. What do ya'll recommend?
  22. O

    Replacing Rear Shocks...what are my options?

    Hey all. I have a 2008 Yukon Denali XL. The rear shocks are leaking. I replaced the compressor which was fried and found that with heavy loads, the shocks leak and the compressor just keeps running. With 2 adults and 3 kiddos and a little cargo, the shocks will fill up and hold air for a bit but...
  23. O

    2008 Yukon XL Denali air ride suspension failing

    Hey all. I've got 130,XXX on my 08 Denali XL. I am certain the rear air bags are failing. The compressor comes on all the time (and it's loud) and I can hear a tiny hiss when the vehicle is turned off immediately afterward. I have read a little about the subject and was wondering what the...
  24. O

    Xl Denali shift clunk

    Looking at an 08 Yukon XL Denali and it drives great. Only thing is when it's in Park and I shift it to Drive or Reverse, the clutch makes a decent clunk sound. Shifts good and didn't notice any slippage but I'm curious about the sound. Doesn't make is when shifting to Neutral, just when going...
  25. O

    Looking to jump into a Yukon XL

    Hi all. I am new to the forums and Yukon world in general. I am looking to get into a good used 07/08 Yukon XL to accommodate a growing family. There isn't much out there in terms of somewhat lower mileage vehicles in this year/price class. I am looking for something around 80-90,000 miles. I...

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