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  1. U

    Sheet metal sound when under load

    2015 GMC Yukon Denali with 6 L80 tranny. So I get a loose sheet metal sound when driving underload. It will stop if I let off the throttle. Also between 1500 and 2000 RPM the truck feels like somebody has the brakes on,after that it releases, no codes. anybody ever else had this happen. I just...
  2. U

    Highly classified

    2015 Yukon Denali
  3. U

    Highly classified

    That’s what I don’t know if anybody can figure it out please respond back or I’ll send my phone number to talk me through whatever I need to do. I would love to be able to tune my engine to get more horsepower since I have the presidential motor.
  4. U

    Highly classified

    https://www.facebook.com/share/r/6tMSKHTkUXYF2pfS/?mibextid=UalRPS
  5. U

    Highly classified

    I saw this cheat code on Facebook and want to know if it’ll help me get more performance out of my motor, etc. etc.
  6. U

    Highly classified

    Anybody help me with what these mean? and walk me through what I need to do.
  7. U

    Power running boards

    OK now that everything is lubed up I can push it in with my hands and it’ll stay in but when I open the door it opens back up when I shut the door. It won’t go back in like it’s hung up but I can help it with my hands every time and was trying to keep doing it to see if it would eventually work...
  8. U

    Power running boards

    I checked everything and after lubing it up, and I guess sitting a while it will let me push it up in , then it forces itself back out
  9. U

    Power running boards

    Ty
  10. U

    Power running boards

    I’ve used my hands and it will not budge any farther
  11. U

    Power running boards

    No
  12. U

    Power running boards

    I sprayed silicone wd 40 on all moving parts. Can I disassemble them and clean them?
  13. U

    Power running boards

    2015 Yukon Denali power board stays out. When I shut door it tries to go in but only about 1/2” then goes back out. Acts like it thinks door is open.

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