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  1. M

    Low Engine Temperature

    Running rich cools combustions ...
  2. M

    2016 5.3 Tahoe collapsed lifter & AFM delete question

    This is incorrect. Cylinder Deactivation is not required to pass smog. The tough part is finding a tuner who will tune the ecm to disable the cylinder deactivation so that the deletion does not throw a code. It's the code that causes the failure. If the ecm is tuned to disable the deleted...
  3. M

    L87 6.2: “NHTSA to investigate potential for engine failure in nearly 1 million GM trucks, SUVs”

    Pardon me for being redundant, but the last time I posted this was in another thread about failure-prone 6.2L V8s from last year. Tyler Durden was explaining his former job as a 'recall coordinator' for a 'major automobile manufacturer to another passenger. His job was to apply 'The Formula' -...
  4. M

    L87 6.2: “NHTSA to investigate potential for engine failure in nearly 1 million GM trucks, SUVs”

    What's going to happen to all those L87 'cores'?
  5. M

    Cylinder head recommendation for 5.3

    All the above advice is sound. Specifically, I would rather spend money improving the heads you already have Since you posted in the GMT800 forum, I'll just go ahead and recommend 4.10.
  6. M

    Opinions on the previous generation of tahoes or Yukons?

    Front fenders, hood, headlights, grille, bumper cover, don' think it's much more complicated than that.
  7. M

    Advice on Chips

    I suggested you do your due diligence and decide for yourself after mentioning PCM Performance and BlackBear Performance. Regarding axle gears, my understanding: 2WD came with either 3.42 (wah) or 3.08 (WTF?!) 4WD came with either 3.42 (wah) or 3.73 (soso) To find out definitively whether it...
  8. M

    how much oil pressure is to much oil pressure

    Of course. Point is, you oughta go and get it checked. Our conjectures can't give a definitive answer either way, so, go find out.
  9. M

    2025 8 Lug Suburban

    Some things don't take as many zeros, like an L8T or an L5P - although adding the DEF stuff shouldn't be too hard, the upshot is that there's likely several reasons why GM did not bother making the L5P available to the genpop in a Suburban. My opinion is that GM is wrong about that ...
  10. M

    2025 8 Lug Suburban

    A 6.6L L5P also fits underhood, like it was meant to be there ...
  11. M

    Opinions on the previous generation of tahoes or Yukons?

    I have the mindset, but not any of the other logistical advantages that would let me.
  12. M

    Opinions on the previous generation of tahoes or Yukons?

    GMT400 1500 front brakes are egregiously undersized. Personally I can't speak on the 2500 front brakes. Ever bother to compare the front rotors? 'cause if I had to choose between bigger front rotors with vacuum assist, or smaller front rotors with HydroBoost, I'll take the larger front rotors...
  13. M

    Bad mpg?

    Can't argue with that. However ... This is actually why I'd let cabdrivers and other people who 'drive for a living' submit their MpG records, and compare those against the CAFE tests. I've noticed that the 'cheapest no-name' petrol I can find tends to get slightly worse MpGs compared to...
  14. M

    Opinions on the previous generation of tahoes or Yukons?

    This is the kind of stuff this forum should prioritize: flexible definitions of GM OE that make the GMT400 GMT800 & GMT900 even easier than GM originally intended to maintain and upgrade with stuff that anyone can order from RockAuto's parts menu for the foreseeable future. I mean, front brake...
  15. M

    Opinions on the previous generation of tahoes or Yukons?

    GMT400 front brakes? Or GMT800 front brakes? Is the GMT900 front brake kit as plug'n'play for a GMT400, as it is for a GMT800?
  16. M

    Bad mpg?

    I find it interesting that most normal people driving as they normally do, tend to get less MpGs / consume more fuel per unit of time compared to the CAFE MpG test scores. That being the case, why hasn't the test been amended to correlate more closely with how normal people drive?
  17. M

    Bad mpg?

    I definitely care who is right and who is wrong - and it's not an interesting 'discussion'. Only one properly provided all the 'very interesting' and technically factual info, that you (and others) learned from. There is no meaningful justice in painting them both with the same brush. Hopefully...
  18. M

    Lug Nut replacement...

    Of course not - it's an american forum. EDIT: by the way, @Seamus, what were you trying to say? Some people appreciate George Carlin's and Doug Stanhope's version of the 1st amendment better than others.
  19. M

    Advice on Chips

    An '07 '08 or '09 Escalade or Denali with an L92 or L9H 6.2L kicks arse, despite being undergeared. '10-'13 have the L94; you'll likely need to disable and eventually delete the Engine Half@$$ bullschidt. If you don't find a Denali or Escalade for a trade-up, what axle gears does your Tahoe...
  20. M

    Advice on Chips

    You can see in my sig I used PCMperformance.com Easiest thing to notice, if you were to drive any other '00-'06 Z71, or go 'back to stock', is mine responds much more quickly and crisply to throttle movement. Mine simply needs much less extra throttle to go from 'Jekyll to Hyde', so to speak. I...
  21. M

    Advice on Chips

    So, a 4door, then. Just kidding. I was saddened when GM gave up on barn doors. And shame on the aftermarket for not stepping in and fixing this! No GM vehicle since the mid 90s uses 'chips', much less 'performance chips', for which we all should be grateful. Either you ship your powertrain...
  22. M

    DOD delete but keep VVT?

    Get your used oil analyzed, preferably the most recently used motor oil. They might be able to tell by what they find in it, which bearings (if any) are shedding / wearing down. Have you yet done the 'add 2 extra quarts, point it steeply downhill, see if oil pressure improves' test? Also, have...
  23. M

    DOD delete but keep VVT?

    Engine Half@$$ subroutine was left UNenabled in the ecm. Engine Half@$$ hardware should come out, no matter what. What's the reasoning behind this thought? Even if CA can visually detect that it was PHYSICALLY removed from the engine, CA has no way of detecting whether or not the VVT subroutine...
  24. M

    Transmission woes?

    Don't know it as thoroughly as the mid-90s Caprice, but I know final Caprices well enough. Best bang-for-the-buck performance sedan GM has or will ever make, sadly. If he gets the '14 Caprice PPV well enough, he can tune your '14 SSV. Nothing beats using real-time driving data to fine-tune your...
  25. M

    Transmission woes?

    If you manage a 10L80 conversion, 3.42 is PLENTY of axle gear!

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