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  1. K

    Looking to go to 4.88's from 3.73's

    Ok so I got a 6" lift on 35's and as of right now I have stock 3.73 gears. I lost a lot of get up and go with the lift and tires with the stock gear ratio. I'm doing some towing of a camper recently too so I really need to switch them out. In feel like I'm wasting more gas on top of it due to...
  2. K

    Possible fuel pressure issue?

    Thanks. I got the assembly installed yesterday and I still have my issue with the power at wot from a dead stop. I'm gonna try to check the fuel pressure as soon as I get a chance too. Hopefully that's fixed at least. I'm wondering if the torque management is really that significant to where I'm...
  3. K

    Fuel pump failiure

    Great idea, but I don't think I wanna do that to my Yukon. Lol
  4. K

    Possible fuel pressure issue?

    I'm going to take a wild guess and say that's probably the reason why, even when I use higher octane fuel, the motor will still ping at high rpm. I ended up placing the order for a new Delhi fuel pump assembly from amazon. Got it at a great price of $224. I'm sure the labor will cost me more...
  5. K

    Possible fuel pressure issue?

    One more thing. When I put the bullydog tune on it, it isn't anywhere near as noticeable. It actually runs decently. Why is that?
  6. K

    Possible fuel pressure issue?

    So do you think that's my main problem with lackluster performance while accelerating? Its just so weird that I lift off the gas and it pulls harder.
  7. K

    Possible fuel pressure issue?

    Ok I've done some searching and can't find the same issue that I have, so I figured to ask in a post. I have a 2004 Yukon 6.0L . The truck starts no problem, but in the morning my issue is much more prevalent. If its real cold and I give the truck wide open throttle, it really falls on its face...
  8. K

    Does 2500hd lift kit fit 2500 yukon

    Lmfao!!!! Did I really? I have a shitty ass memory lol. Well either way I think with the kit and the tire package I bought... (20x12 -44 on 35's) I'm gonna need to do some trimming for it to work.. Fun fun
  9. K

    Does 2500hd lift kit fit 2500 yukon

    I ended up saying to hell with it an bought a Zone kit.
  10. K

    Does 2500hd lift kit fit 2500 yukon

    I ended just getting a 6" zone kit on eBay which included the optional Fox 2.0 shocks. Ebay had 8% eBay bucks the other day, so purchasing the kit gave me $100 in eBay bucks. It came out to $1,595 no tax and free shipping. Plus those eBay bucks! I think it was a great deal, so I had to get it. I...
  11. K

    Does 2500hd lift kit fit 2500 yukon

    What exactly does that mean that it doesn't require a torsion bar drop? I'm also in the market for a lift kit for my 04 Yukon xl 2500. So many to choose from and they vary so much in price and fitment. I even saw a few that says I need to buy a kit to modify the exhaust in order for it to fit.
  12. K

    Trimming guide for fitting 35's with a 6" lift *covers trimming requrements for ALL width wheels*

    Awesome info! I do have a few questions though. I have an 04 Yukon xl 2500. I'm planning on doing a 6" lift and getting 20x12 -44 rims with 35's. Do you think it would clear being that I have a 2500....or do you think I still need to trim? Also I'm new to this, but from I read I saw that you can...
  13. K

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Installed my new bully dog today. Man what a huge difference in power!
  14. K

    Error codes p0120 p1516 p2135.....ugh

    So I left the barber yesterday and started my truck up. Bells start going off and it says "reduced engine power" and the truck has very low power for sure. I turned the truck off and waitied for a few minute to start it back up. Truck started up and ran normal again but still has the cel on. I...
  15. K

    High Flow Cat for 04 Yukon XL

    I'm gonna see about getting a pair installed wirhimg the next few months. Have other issues right now unfortunately
  16. K

    High Flow Cat for 04 Yukon XL

    Not sure if they're bad at all but my truck has 174k on it and I'm pretty sire they're the original cats.
  17. K

    New to me...has a miss

    Mine just got checked out today. They said the stumble that it has on idle is normal for these motors and that the fuel trims were all fine while he was test driving it. Idk....I still think it isn't right personally. I shouldn't barely keep up with a civic when I have a 6.0L.....I don't care...
  18. K

    New to me...has a miss

    Good for you! So you're injectors were screwed huh? I'm taking my truck to the shop tomorrow finally after a few reschedules. Hopefully they find why my truck is so weak and with a miss
  19. K

    Police brake pads ?

    Yeah i wont argue with you there lol. Honestly I wanted to hop onto this thread in hopes to get some brake pad info because my pads are pissing me off.
  20. K

    Police brake pads ?

    Idk but I need to change my brake pads asap. Not sire what kind of pads the previous owner used but they squeal a lot! So annoying and embarrassing.
  21. K

    High Flow Cat for 04 Yukon XL

    So im looking to replace my cats with high flow ones during my new muffler install. I found a few that were pretty cheap....around $80 each. Is it necassary to get an obd2 compliant cat or is a pre-obd2 cat ok? And any good suggestions as to which one i should go for? I was looking at the...
  22. K

    random misfire

    Really? Mine also has a loss of power on acceleration that feels like its being held back. Did you have this too? I think I'll try to find this coil pack check procedure online if you don't have it.
  23. K

    How many miles you guys got on the odometer?

    I have a rough idle still but my dash ain't lit up like a tree. I don't wanna throw parts at the truck either, but I have 173k on it and I'm sure they're the stock coil packs in mine. Might be what I get next. Glad those things fixed your truck....I'm hoping itnfixes mine!! Thanks for the links...
  24. K

    turbo

    Would love an update on this project!
  25. K

    Exhaust configuration question for Yukon 2500 6.0l

    Well I see that was a denali....it also has a 6.0 so I don't know why my exhaust isn't exactly the same. Would be much easier if it was.

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