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  1. Zed 71

    Some sort of knocking...

    On the next tank just try and use Teir 1 87 octane gas. No need for higher octane on a stock truck and it will have cleaning agents also.
  2. Zed 71

    New tune that is amazing

    DIC is not a good way to track this. Try a GPS based mileage are report back.
  3. Zed 71

    Some sort of knocking...

    IMO just bring it to the dealer since it is under warranty and have the issue logged. BTW are you using Tier 1 gas (Chevron, Phllips, etc.)? Any other mods?
  4. Zed 71

    Replaced evap canister now getting code P0446???

    For those replacing EVAP canisters, how do you fill the tank? Finish after the first shutoff or try to put in more afterwards?
  5. Zed 71

    Replaced evap canister now getting code P0446???

    Borrow a code reader and find out what P0446 and post back.
  6. Zed 71

    New 07 yukon Denali owner, few performance questions.

    Regarding the BB Tune depends on how much you want to spend, can you do an in person tune, and will you want to change/adjust in the future (more mods). As far as CAI, hopefully someone with a 6.2L can chime in (SS?). IMO depends on what your objectives are. In my experience, CAI with...
  7. Zed 71

    True Duals

    You can buy a Magnaflow X-pipe (I would not use an H). I agree with goodinblack regarding lossing low end if this is not done correctly. The piping will need to be sized so the exhaust velocity does not drop; at the very least keep the same OEM piping diameter (also not efficient though)...
  8. Zed 71

    Troubleshooting a Vibration

    ^ This.
  9. Zed 71

    Dyno timeeeeeeeee

    Nice gains from those mods. Please post the dyno chart, I like looking at the curves.
  10. Zed 71

    E85 FlexFuel vs Regular gas calculations

    Is the Yukon AWD and for those of you with larger rims/tires, did you get the speedometer/odometer adjusted for the increased size? It seemed like the Tahoes with the 4.10s were getting better mileage. The thought was the truck could get up to speed with less effort and it seemed like V4...
  11. Zed 71

    E85 FlexFuel vs Regular gas calculations

    Similar calcs when I bought mine back in 2007. But you not getting very good mileage on regular. I got better when I was stock (~17 city mpgs), and getting around ~16 mpgs now with level kit and MT tires (but I have the BB tune :driver:).
  12. Zed 71

    Pinging noise, wtf now?

    Yes check the spark plug gaps. Also check your K&N and if the MAF has oil on it.
  13. Zed 71

    Your Tahoe on our Marketing Flyers

    Are you looking for rigs modified at your shop to represent your work? Also are you looking for lowered or lifted trucks?
  14. Zed 71

    this guy likes to park next 2 me at the gym...

    You guys are hilarious and this is getting a little :supergay:...
  15. Zed 71

    How are your aftermarket brakes holding up?

    I have never had to clean out the slots on my rotors for the Tahoe or G35 coupe. The pad material should not accumulate/clump like that. On the Tahoe, my setup has been on for 50k (4 years) and I have nad no accumulation. On the G35, which I drove hard, that setup was on for 7 years and 3...
  16. Zed 71

    Leveled Z71 Tahoe

    Oh yeah the 4:10s are sweet!
  17. Zed 71

    Pinging with 87 Octane and Black Bear Tune

    +1 Also since you are relatively close, you can have Justin take a look at the mapping tables to adjust if necessary.
  18. Zed 71

    3.73 gears are in the esky.

    ^ that's a good price.
  19. Zed 71

    Leveled Z71 Tahoe

    How's this? It was 0.25" higher in the back with out the air bags. However, I think this picture was taken when after I installed the air bags.
  20. Zed 71

    Custom 07 up Y Pipe Project.

    Hmmm, if the stock exhaust piping is 2.5-inch then increasing to 3-inch may reduce the exhaust velocity (reduce scavaging) which will result in a loss of torque in the low/mid range. IMO I would research a little more (GMFS forum) to see some real world results. In any case, I would like to...
  21. Zed 71

    Wrangler Duratrac???

    What are your expectations and truck use? Based on reviews, the Duratracs are good on and offroad, and also in the snow.
  22. Zed 71

    Specific Request: Pics of Leveled Yukon on Factory 20's

    IMO white letters in for Yukons. I think Z71 are the only ones that can pull off the white letters out look.
  23. Zed 71

    NEED HELP - Variation of Stabilitrak Issue

    Sounds like you are having the battery discharge issue. There is a TSB out for this and a reprogram can be done by the dealer and have the battery checked again. Also have the alternator checked. Did you buy this used?
  24. Zed 71

    Vibration in Sterring Wheel at 70+ mph / want a smoother ride

    For this class of SUV the suspension is pretty good for everyday driving. If you want more compliance, IMO a change in struts/shocks would be the way to go. Go to a suspension shop and discuss what you want. I have heard Bilstien 5100s are pretty plush, but I have had no direct experience...
  25. Zed 71

    Rough idle after tb cleaning

    ^ unless I am missing something, that proceedure does not recalibrate the throttle body. Also I would not recommend touching the positive and negative connections together, the ECM and other components are sensitive.

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