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    Lifted/Leveled 2021 - Postem Up

    Good job on the bracket mod. Its not a mudflap bracket like some people say. Pretty sure the parts list calls it a frame extension. Not sure why it's there, but I surmise it helps with the small Overlap Front crash test and minimizes jamming the wheel into the cab. I used shims to angle the...
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    Deciding what to do with my 2023 Denali

    They say the 25 engines are okay. Why not trade it sooner than later?
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    BREAKING: GM is officially recalling the L87

    18 Z06 LT4 called for M1 5-30 but on track use 15-50. Then 19 LT4 said 0-40 because they just came out with that oil. It also said you could still use 5-30 and 15-50 if 0-40 is not available. They also said 18's could use 0-40. The supposed advantage was 0-40 could be street and track. I had...
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    Round 7, my new RST 6.2 Perf. pack

    For all I know the bearing issue could be from the DFM putting unbalanced load on the crankshaft. Regardless, you can send your ECM in and get it unlocked and then they’ll tune it. It’s a lot to spend for mild tunes. There are companies putting superchargers on them so they should know how they...
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    How do you Jack/Support your truck?

    Maybe have to make our own lift points by cleaning the wax and coating with normal undercoat.
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    best mods so far...

    Carbyte also disables the DFM= cylinder deactivation so the engine is in v8 most of the time. Makes it sound better when running a louder exhaust.
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    How do you Jack/Support your truck?

    Works but its not the same compound as the wax, is it? Should be able to find gm frame wax if one does some searching.
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    How do you Jack/Support your truck?

    The frame wax sticks to rubber pads and comes off on the pads. At least when its fresh and new. Maybe it hardens over time. I saw that there is touch up wax avaialble somewhere.
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    2023 Yukon Denali 6.2L Idle Vibration

    I don't notice anyting like this vibration with my 5.3. Don't notice it with the 6.2 in my camaro or corvette either but those are sc and manual trans.
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    This is Big News - HP Tuners GM Global B E99 ECM & T93 TCM

    Do we still have to wait and see? Seems there is no problem tuning these any longer. Does anyone on here have experience to share?
  11. D

    22 premier tire size

    I have 285/60R20 and they rub with a 2.5" lift, but my wheels are +1. At +18 you will probably be okay.
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    Metallic Rattle While Accelerating - Dealer Can't Reproduce (video)

    I do hear it. That would bug me and I would be worried about an engine issue. It does sound like pre-detonation. In my experinece I go to different dealer and tell them what the other dealership did. Then they are happy to win my business.
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    Is New Engine Break In Procedure Still Necessary?

    I didn't feel any difference, but I didn't get on them hard until after 500 miles. I did rev past the temporary redline on accident a few times.
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    Is New Engine Break In Procedure Still Necessary?

    Right. I bet the CT5-V is a blast. They have been doing that on the gauge display for the corvette's for a long time. I have had 3 of them. The tune is no different and you can rev past the temporary guage cluster redline. It is still on the driver to follow the owner manual break in. This is...
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    Is New Engine Break In Procedure Still Necessary?

    GM wrote the owners manual posted above. That's what they recommend. How could they program the computer to randomly change speeds while the owner is driving down the highway.
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    DFM disabler released

    Global B is gm's clasification of the electronic control module used in newer gm vehicles.
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    Spindle Lift on 2021 Tahoe

    You can lift the rear 2" with spacers. The alignment can be adjusted just fine. There are aftermarket toe links, look up Icon, but they say only needed for 2.5 to 4" lift. Maxtrac has the spindles and rear spacers...
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    Engine Bay Noise - Blown Engine

    @DenaliCountry How many miles on your rig? Under warranty still? I am not an expert on depreciation but I don't think a dealer replaced engine will affect the value very much. If the engine is bad the dealer will know it when you trade. Maybe they will take in for warranty repair and get you in...
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    2” lift kit for Air Ride by Rough Country

    It can be done with 21+. Icon for example has the kits. You have to disable both mag ride and air ride.
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    Engine Bay Noise - Blown Engine

    Not like this is it? https://www.tahoeyukonforum.com/threads/2023-yukon-xl-engine-or-drivetrain-noise.152036/post-1935692
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    Driving in L9 and DFM

    @RG23RST Does the dfm vibration cause other damage such as trans problems? Mine definitely feels rough when dfm is active and its only at 5k miles.
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    Suburban Tires

    Looks cool. Additional offset makes it rub more. It looks like you have more offset than the silver one.
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    Is Cadillac dealer service any better than GMC?

    My Chevy dealer sells and services cadillac too. They are better than the Chevy only dealer. The Audi service here is not that great. So I think this just varies by service department. I haven't tried gmc yet because nothing has been needed on this rig. I have 2 Audis and several chevys.
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    Rim & Suspension Mod

    Check out the lifted suspension section. The toyo or nito are popular. Probably not much available in 24. Most people go smaller for off road. Check this one. https://www.tahoeyukonforum.com/threads/larger-tires-on-2025-at4-ultimate.151998/
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    2025 Yukon- Heads Up Display

    Really, you can't see tire pressure?

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