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  1. drdave81

    "Marbles in tin can" sound after installing K&N Intake

    Have you tried taking it off, see if the noise goes away?
  2. drdave81

    Blown Headgasket?

    Do you get white smoke on start up? Does your exhaust smell sweet? That would tell you if you're getting coolant into the cylinders. It could still be a head gasket, or even the head, depending on where the head cracked. What casting number do you have, 706?
  3. drdave81

    Trailblazer torque converter with a 5.3?

    I just put one of those torque converters in mine when I had the trans rebuilt, and I'm happy with it. Go for it. Mine isn't stock, or a 5.3, but you'll be happy with it.
  4. drdave81

    Buying 06 Z71 in limp mode because of leak from transmission to transfer case?

    Go buy a cheap code reader, then go check it out. See what the codes are and google them. That will give you a good idea and maybe be able to negotiate. Though, if the body is clean and the vehicle is in decent shape, $1500 is a good deal. Trans can be rebuilt pretty cheap, and a used one is...
  5. drdave81

    Custom driveshaft after lowering?

    I know I'm chiming in kind of late here but...............I don't know of anyone who's had to replace a driveshaft after lowering these. @NORCAL SS would know better since he drops these things for a living, and I've never heard that mentioned, even with guys who go even lower than 3-4". I'd...
  6. drdave81

    Oil Consumption

    Since you said someone did work on the heads, I would take it back to them. What all did they do to the heads, how long ago was this done? Piston rings aren't typically something that goes bad on these engines, so I would tend to lean toward the valve seals, especially since you said someone...
  7. drdave81

    Transmission Removal

    I'm only 42 and it was miserable pulling mine. Hard pass if it has to ever come out again.
  8. drdave81

    No More EGR Block Off Plates?

    Not offensive, just a good discussion and information as far as I'm concerned. I work in emissions certification for Stellantis. Trust me, an aftermarket cam and long tube headers can absolutely make you fail some of the emissions testing. That's why they mark those parts as offroad only...
  9. drdave81

    01 Yukon Denali Build Thread

    Haha, oh I'm well aware. I've seen your build thread!!!! Only a lot jealous of yours.
  10. drdave81

    01 Yukon Denali Build Thread

    OK, I went and ran it with Dragy again lol. Before and after times below. I had the cat back and CAI before, they were on when I bought it. The after times are with a BTR Stage 2 cam, long tubes, rebuilt trans, and a Blackbear Tune. I'm pretty happy with the gains, it's a lot more fun to...
  11. drdave81

    01 Yukon Denali Build Thread

    I got it tuned, flashed and have been driving it around for a little while now. It's so much better than before. I'm sure that's a mix of the tune and having a rebuilt trans, but man is it so much better. I need to get out with my Dragy to see how much of a difference it made. Then flash the...
  12. drdave81

    No More EGR Block Off Plates?

    There weren't any in the yards around me at the time, you couldn't find the GM one online either, no one had it stocked. That's why I originally made the post, no one had them at the time. I found a place selling one quite a while back though.
  13. drdave81

    No More EGR Block Off Plates?

    Then we cant discuss cams, tunes, headers, or anything else on here either. Because they all modify emissions beyond the manufacturer specifications. Can't hear your tone, so I don't know if you were joking or not. I hope you were though.
  14. drdave81

    01 Yukon Denali Build Thread

    Between a bathroom remodel and a ton of other stuff, this got pushed to the back burner for a while. I finally did get the trans rebuilt. I found a shop 10 minutes from my house who did it with all the upgraded internals; corvette servo, hardened sunshell, etc etc, and a trailblazer torque...
  15. drdave81

    2006 Yukon Oil Pressure Drop After New Heads Installed

    How are you reading oil pressure? The gauge in the cluster or an actual mechanical gauge in the block? If you're basing it on the cluster, confirm it with a mechanical gauge first. Then go from there. What is cold pressure at? Is it always low or start normal and drop as it warms up?
  16. drdave81

    Any benefit to running anything above regular (87 octane) in 4.8L V8?...

    If your engine has a factory tune on the ECM, running a higher grade fuel will not change anything. Your engine/ECM are tuned for 87 octane and to handle any detonation based on that. Changing fuel without changing the tune doesn't do any good because the ECM doesn't know it has any different...
  17. drdave81

    2005 Denali XL Speakers from Crutchfield won't work?

    Did you mess with the wire harness going into the door from under the dash at all, or do nothing more than replace a speaker? Were you running new wiring for the speaker?
  18. drdave81

    Is a Denali worth it?

    The 6.0 does only require 87 octane. Unless the ECM is tuned for running something more than that, you won't really get any benefit from it. People run premium for all kinds of different reasons (more power, cleaner, etc) and think it does something, but for the most part, it's a placebo effect.
  19. drdave81

    Thin gray line tahoe build

    Find a new tuner, a stage 3 cam and stall should not cause issues like that. Have you reached out to Blackbear? Highly reputable on here, they've done two of my vehicles and been great.
  20. drdave81

    Lowering a Tahoe

    DIY for me may be very different than DIY for you. I don't know your skills, so I can't say if you can do it or not. Can you change rear springs? Can you change out front hubs and spindles, maybe control arms if things are found to be bad? Replace shocks? Depending on how low you go, can...
  21. drdave81

    Alternatives to Rear Seat Audio ?

    I think you can disconnect it, you just need to connect the pins from each connector to close the circuits again. Basically bypassing the audio controls. I remember reading something about that on here before, someone else did it.
  22. drdave81

    2003 Chevy Tahoe Performance Chip Recommendations

    From a "chip" alone? Not a chance. You'd need way more than just a tune for 60hp, and definitely not from a plug n play preprogrammed tuner (chip).
  23. drdave81

    Engage starter, radio shuts off for a split second??

    Ahh, I thought you meant the usual radio goes off while cranking. Not actually losing power. Got it now. Yep, as Fless said, load test and check all your cables, grounds, connections, etc.
  24. drdave81

    Engage starter, radio shuts off for a split second??

    That's always been the case with every vehicle I've owned. They cut power to all other accessories since the starter has such a draw.
  25. drdave81

    2005 UQ7 Bose Speaker size question

    Both front and rear doors are 6.5s. They say 5.25 will work, because they will with an adapter. As far as using the factory holes, that would depend on the aftermarket speaker and the hole locations for that specific speaker. Sometimes you get 3 out of 4 that line up, sometimes more or less...

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