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  1. Tim907356

    2010 Yukon Denali XL Towing Sway

    My buggy has 204k mi., and I've been towing a 7k#, 30' travel trailer for a few years. The biggest issue is the sway at highway speeds. Most of it is when trucks pass by, and my rig gets pushed aside by the air pressure. I'm wondering what the best way would be to stiffen the rear end, and...
  2. Tim907356

    2010 Yukon Denali Overheating when Towing

    The truck has ~175k miles on it. The background story is that we have been towing a 4200# dry weight Travel Trailer for about 5 years with minimal issues. At first, the transmission overheated, hitting near 230F on one of our first 'mountain' tows on a 90F day, so I put the trucool 40 in line...
  3. Tim907356

    'Service Suspension System', 2010 Yukon Denali

    So I just changed out the rear shocks, after discovering the perforated air bags. My compressor would run whenever it was out of level, but it never threw a code/alert. Now, with the new shocks, they were actually working, leveling the load when we put weight on the rear. However now, maybe...
  4. Tim907356

    Transmission Stumble

    My vehicle is a 2010 Yukon XL Denali with 129k miles. I think I'm the first one to tow with it, but we bought it used from a street lot, so don't know anything about its history. The hitch looked new when we first hooked up our 5000 lb. travel trailer. It's only been towed 3 times. I'm on a...
  5. Tim907356

    Heatin/overheating??!

    So, were taking our first weekend getaway to the nc mountains, near Cherokee. We’re pulling our, let’s say, 4500# travel trailer. Going up hills, even modest ones, I see the temp gauge rise to as much as ~240deg. or so. I’ve never seen it move from 210 before,but haven’t loaded it this much...
  6. Tim907356

    2010 Denali-Intermittent voltage drop

    When we bought the 2010 Yukon Denali, I noticed that occasionally, the voltage gauge would drop to below 13v. It quit doing that over the first month or so, and for the last several months, its always read above 14v. I had to jump my mothers car this weekend, and since then, the voltmeter reads...
  7. Tim907356

    Front end clunk

    My 2010 Yukon Denali just started this the other day. I’m used to hearing ball link or strut clunking on old vehicles, but this was really loud! Any uneven surface seems to make a loud cracking sound under the front; curbs, gravel, rough dirt...it’s been fine since we bought it 3mo. Ago, then...
  8. Tim907356

    High Oil Pressure, 2010 Yukon Denali

    I've seen a few threads on this topic, but just want to justify my conclusions. I bought this Yuk a couple of weeks ago, and it threw a P0521 code on a 100mi. trip today. I had it read (left my OBD2 at home!), at an Autozone, and then noticed that the gauge was indeed reading a good bit higher...

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