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GMC Yukon / Yukon Denali



  • larry91larry91 Posts: 189
    As I posted earlier, I had the same problem with the transmission locking up. Luckily, the problem went away as mysteriously as it appeared and I have not had a problem since taking it to the dealer for my normal oil change. The service writer thought it might be low transmission oil level.
    Hope u have the same luck
  • larry91larry91 Posts: 189
    That should be you're welcome, proper grammar u know.
    Take care
  • Can't seem to figure out if I should purchase the 2002 Toyota Sequoia or the GMC Yukon Denali (short body). I've done so much comparison that I just confused my self. Both vehicles will price about the same. I'm not familiar with the problems with the GM models.
  • tidestertidester Posts: 10,110
    Welcome aboard! I am sure other members will be more than happy to help you out!

  • Go test drive them both and decide for yourself. I did and bought the Denali XL.
  • Larry91, Heatwave3 and anyone else interested, I have tried to post a photo of my 01' denali (polo green over gold) at the following website. Hope you get to see it. If it works I'll try a better resolution/picture. The photo is located at:

    Thanks for all the info on this site. I love my denali. No major problems yet (7000 miles). I did have the passenger seast belt replaced - kept locking up. Think Iv'e felt tranny slip once or twice when I accelerate but not sure.


  • Think pic website works - yea!!! Sorry for the mis-spelled works on the last post. CU

  • debster72: nice job on the two-tone. How much did the lower paint job cost? Did you get the relays for the hi-beams, fog-lites and door locks? Another nice touch is replacing the ruby-red logo with an all aluminum billet GMC logo that fits in the same location as the OEM. Really stands out and would look great with the green and gold instead of the ruby-red logo.
  • Larry:

    Brought my Denali back to the dealership with a printout of the information you provided and all of a sudden the flood gates (of honesty) opened up! The service manager fessed up to knowing about this problem. It turns out that there are quite a few problems around the country with the 4L65 HD transmission locking up (in other words, ours are not isolated cases!). They promised to have a "fix" in the near future, though I am a little skeptical after their less-than-honest ignorance of the problem on three days ago. I'll keep everyone posted!
  • Hello Everyone,

    Been a while since I have logged on, I wondered if anyone has experienced belt noise from their Denali. I have had the truck in several times and they put a silicone dressing on the belt and thats good for about 2000-3000 miles. I finally said this is ridiculous and told the dealer to replace the (2) belts and the tensioner. This solved the problem for about 10,000 miles and now its back. If anyone has any comments or has had this problem I would sure like to hear about it.

    I also found a guy out of CA that will chrome your existing Denali Wheels, He is great to work with and the cost is $100.00 per wheel & $16.00 per center cap + freight. You can E-Mail him at I have done this to (2) Denalis and the look is great.
  • larry91larry91 Posts: 189
    I really like your two tone paint, nice job. Please try to take another pic with a full side view. I would like to see a larger area
  • larry91larry91 Posts: 189
    Good for you. I guess the squeeky wheel does work.
  • lobsenzalobsenza Posts: 619
    The dealer should replace it for nothing up to 3 year/36,000 miles
  • I had an 8 year old chevy van whose belt began to squeak after a rain or high humidity. The belt looked ok but I figured it was time to get a replacement. A mechanic told me to save my money and buy a bottle of STP Son of a Gun protectant and squirt it on the belt when necessary. It worked fine.
  • Have you corrected the problem with your climate control yet? I have replaced the controller on mine but didn't help.
  • larry91larry91 Posts: 189
    I have never owned a vehicle with a serpentine belt that didn't squeak.
    Thanks for the info, i will certainly give it a try when my belt starts to squeak. My only ? is can that cause the belt to slip???
  • Since the squeak goes away I don't believe it does slip.
  • Will try to post a better photo later this week. The digital is at my office. The 2-tone paint cost me $550. I had the top portion of the front bumper done, the lower rocker panels and the lower end of the rear tailgate. I did not paint the rear bumper, running boards or the lower portion of the front bumper. I did not want the lighter color of the 2-tone paint to accentuate the lower look of the assist steps or front air dam. I get a lot of looks, it really stands out. I would like to get the GMC front emblem but didn't want to spend $89 bucks. I am getting the high/low beam relay. Door locks don't bother me - I have 2 young kids so I prefer the delay in unlocking.

    ? Is it normal for the AC light to come on when you use Auto on the climate control even if its 40 degrees outside. I usually turn it off when it comes on. Don't want any more cold air!

    Later, Debster
  • larry91larry91 Posts: 189
    Good, I am anxious to see the new photo with a greater side and full front view.
    Re the a/c light. It will be on when u are in auto mode, it goes between air and heat depending on the temp inside the vehicle, to keep it at a constant temperature.
  • My 01 DXL was doing the same thing only in the rear. In order to get any heat you had to turn it to full heat setting in Auto mode. Any other Auto mode setting would blow cold air full fan. The dealer took the whole back apart, talked with GM technical support, tried several parts before replacing the rear climate control computer. That solved the problem. The Denali has five temperature sensors for the climate control system. Mine were different by as much as 40 degrees according to the computer. Find a good service department and tell them to talk with GM technical support to resolve the problem. Good Luck!
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