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  1. Fast_AT4

    CEL U0121

    Was able to remote start this morning #ColdStartLove and no CEL. Will be chatting about the CEL upon my next oil visit or if returns.
  2. Fast_AT4

    CEL U0121

    Remote start didnt work this morning and upon getting in, noted the CEL. Chatted with OnStar and they stated I dont need to be worried about it or take action...? U0121 seems to be related to loss of communication with ABS module. Is this a "known" event and the CEL will "just go away" as...
  3. Fast_AT4

    Oil sensor variance?

    Some people just like to get from A to B and others like to take in the ride a bit more.
  4. Fast_AT4

    Oil sensor variance?

    Stopped and added one in the parking lot, will check levels in the AM. Yeah, I do alot of stop/go driving to/from work mostly. And with in Sport Mode and L9, Corsa Exhaust...I enjoy my drive as much as I can...so I can only assume that is why my oil level is how it is vs the oil life. Even my...
  5. Fast_AT4

    Oil sensor variance?

    To be honest not sure...but will now keep a log book in the glove box moving forward after next oil change. Per the dealership sticker, around 1,500...but again, these are speculated numbers under "normal" GMC spec'd driving condition. So maybe the shown MPG might shed some light on the...
  6. Fast_AT4

    Oil sensor variance?

    If GMC had a BTC gauge, it would read based of speculation and show 225K vs reality:
  7. Fast_AT4

    Oil sensor variance?

    In Who give a shit about "Oil Life" if it truly doesn't mean much, give me a "x% oil remaining" notification/reading.
  8. Fast_AT4

    Oil sensor variance?

    So the "oil life" really doesnt mean shit as what I gather now it is based on x and y factors and not actually reading any oil level sensors.
  9. Fast_AT4

    Oil sensor variance?

    For my last 2 M5's, I used to keep 2 spare qt's in the boot just incase as M5's are know to burn more oil and also due to "spirited driving" i'd assume. Spoke with the dealership and they said on the next oil change they will need to run an oil usage/consumption test.
  10. Fast_AT4

    Oil sensor variance?

    What the shit! Whats the consensus....add in 2qts?
  11. Fast_AT4

    Oil sensor variance?

    LOL. Will check it on my way out of work in a few hours.
  12. Fast_AT4

    Oil sensor variance?

    Last 2 morning while in parent drop off I get this message...but im @ 40%. Contacted OnStar (earn that monthly $$) and they state (also sending me the report) im @ 40.3%. Never mind that MPG :muhahaha: Will do an "old school" manual check and might even take it in for it if it occurs 1...
  13. Fast_AT4

    Where can I get an HVAC knob/dial?

    If you dont like the chrome look....these are on sale: https://www.etsy.com/listing/1357133383/2021-2023-gmc-yukon-at4-denali-1999-2023?click_key=ee85b9b034641ba352a8993333c9c9223b24d675%3A1357133383&click_sum=a782b7bc&ref=shop_home_active_1&pro=1 :cheers:
  14. Fast_AT4

    2022 Yukon AT4 wants BASS

    Switching gears a bit. Going with this Lithium as it can be dropped in with an existing AGM and SUPER small/light so I can hide in the back. https://bigjeffaudio.com/products/big-jeff-audio-compact-22ah-12v-lithium-lfp-battery-6000w-bj-li-22ah?variant=43928349278456 Hope to be ordering in the...
  15. Fast_AT4

    2022 Yukon AT4 wants BASS

    Looking like i'd be running the positive and negative off the battery under the AT4 and coming up thru a grommet in the hatch area to connect to battery 2.
  16. Fast_AT4

    2022 Yukon AT4 wants BASS

    Did a "dirty" dry test today, just to make certain all worked as expected: ran 0gauge to amp grounded to bolt for my testing purpose ran remote wire from front passenger fuse box to amp jumped out of amp to LC2i All powered on when the AT4 was started...so no battery drain. Cut the below board...
  17. Fast_AT4

    2022 Yukon AT4 wants BASS

    I was going to run 0Gauge for power from the main battery to the second battery - Inline Fuse - to amp and LCi2 Pro....no?
  18. Fast_AT4

    2022 Yukon AT4 wants BASS

    Will be mounting elsewhere....not under the hood. So size isnt "really" a factor. So other than needing it to be a 12v AGM battery...no other real specs that I need to be concerned about?
  19. Fast_AT4

    2022 Yukon AT4 wants BASS

    @Doubeleive When looking for my second battery, do I need to have any concerns other than it being a 12v? I see many different "Group" specs. Was eyeballing this one: https://www.down4soundshop.com/xs-power-d3400-2500w-4000w/
  20. Fast_AT4

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

    If anyone has a PN for this, I'd be curious what it look like under and the size. I'd assume the Left and Right is the same, just mirrored.
  21. Fast_AT4

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

    ...what are we talking about here....looked back 2 pages and (glanced over them to be honest)....and didnt note anything. #ImBlindMaybe I 3d printed a fender badge for my F250 in PLA+ and had it in the Florida sun for 3 years w/o any deforming.
  22. Fast_AT4

    2022 Yukon AT4 wants BASS

    On my F250, tilt the back seat forward and the Bose amp was right there. I think I even found the pin out on a first search too lol. I would assume GMC would have a proper site for such information like amp pin out with a VIN entry then it queries YOUR specific model. Forgot I saved this...
  23. Fast_AT4

    2022 Yukon AT4 wants BASS

    Would you assume my thinking is right that those are most likely the sub wires due to size?
  24. Fast_AT4

    2022 Yukon AT4 wants BASS

    Lucky you LOL....pointing to where the harness is around.
  25. Fast_AT4

    2022 Yukon AT4 wants BASS

    Based on your image as well as I can only assume the subwoofer wires will be thicker....I think I found the target. Thanks GMC for making me taking out the entire hatch area flooring, rear speaker pillar.....to get the side panel able to flex out enough to get back in there. The Green w/Blk...

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