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  1. R

    Oil for 3.0

    I’ve always been leery of Fumuto valves. Back in early 2000s of my go fast Japanese 4 banger days people who had the claimed the leak. Not the case anymore? I guess it doesn’t really matter with 7qts it would take awhile to run into issues. I’m half tempted to grab one. Where did you get yours?
  2. R

    2025 Tahoe Bose 10 speaker add amp/subwoofer

    Thanks for that. I've been doing some research. I contacted GM and they said my truck doesn't have ANC. But I also reached out to PAC and they said the AP4-GM81 module will work thus eleiminating the Bose amp to its entirety and give me L/R/S outputs. On top of that, I saw JL is making OEM...
  3. R

    Oil for 3.0

    Pasting what I said from the AT4 place: Changed my oil for the first time today at 3600 miles. First time doing a diesel too. I gotta say, that oil was BLACK, yall weren't kidding! Haha. Honestly no different than gas. Drained for 30 minutes, reinstalled bolt, pre filled filter, screwed it on...
  4. R

    2025 Tahoe Bose 10 speaker add amp/subwoofer

    Sorry to bring up a thread from the dead. May you elaborate a little more? Ive got a '26 Yukon XL AT4 with teh 10 speaker system. I see what looks like micophones in the headliner above driver and front passenger. Thats not ANC or is it for phone use? I gotta do something about this bass. For a...

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