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  1. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    Ok...so I unplugged coil packs one by one and the fuel injectors... no noticeable change in idle. I took out the upstream O2 sensors and no noticeable change. Fresh air filter, MAP sensor, still no change... I'm at a loss...I guess it will go to the shop to be diagnosed.
  2. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    No, I didn't! Unfortunately, It is still having the issue. I haven't been able to work on it in the last week and a half. Im working on eliminating MAP sensor, and will look at CAT converter and possibly fuel injector. Not sure what else to check. Otherwise...It can go to the shop and a...
  3. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    me too!! I'll let you know tomorrow when I get it back together.
  4. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    Thank you for your input! Actually, I took out the intake, replaced the valley gasket, put in the new knock sensors, new harness, and sealed it up this afternoon. You said it should take 3 hours, but that is as far as I got in the 3 hours. lol I was having a hell of a time with the throttle...
  5. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    @iamdub - Did you watch and listen to the video? In your opinion, is that what the sound is?
  6. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    Not sure if this works ... So, if the intake manifold gasket blows out, can it create a vacuum leak under the intake manifold? An unmetered air leak?
  7. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    I have a video, but haven't figured out how to post it yet! i did spray carb cleaner around it but no noticeable change.
  8. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    Yes, if I end up needing to do the intake gaskets, I will do the valley gasket, knock sensors, and harness. I ordered AC Delco knock sensors/harness. Also, there is a TSB to put silicon around the rubber seals on the harness to prevent potential corrosion.
  9. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    Great theory! However, The cats and 02 sensors have less than 5000 miles on them, and the psst psst psst is coming from the top center of the intake manifold as opposed to the lower side where the exhaust manifold is. I read on one thread where someone had broken the caps as shown in the...
  10. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    and the live data numbers
  11. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    Yes… po300, 101, 220.
  12. kaysha241

    HELP!!! 2004 GMC Yukon Xl Denali 6.0 intake noise

    So my Yukon has had a little tick that has been there since 90k. Not really noticeable unless you floored it and then you could barely hear it. It now has 250k. For the last couple of weeks whenever it would downshift, and RPM increase, you could hear it a little more and the CEL would flash...
  13. kaysha241

    Front end rebuild help needed!

    I've been reading posts here for close to 10 years to help diagnose issues with my Denali and I was never a member. I appreciate all the knowledge I have learned from all the posts on here. It has been very helpful. I have also read many threads that someone starts, to ask a question, and...
  14. kaysha241

    Front end rebuild help needed!

    I have the same issue. Need to replace front end...Detroit Axle has several kits on Amazon, but not sure of the quality. Does anyone have experience with Detroit Axle? Thanks

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