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  1. M

    Front end Rebuild

    Problem is, it WILL line up and bolt up. THEN, when you drive it, you will know something feels very wrong, but you will stare at it, wondering how and why it all bolted up. If you feel reasonably comfortable swerving at 10MpH over posted 'limits', centerlink is PROBABLY installed correctly...
  2. M

    DFM disabler released

    Few people expect decel (Decel Fuel Cut Out) to have any sound. If you decide you are disappointed, the obvious solution is a different exhaust configuration or setting. Less obvious would be an ecm tune.
  3. M

    14 tahoe 4x4 poor fuel mileage help

    A recent transition from E10 to E15 could have been inflicted upon you without your knowledge.
  4. M

    2002 Tahoe e-fans and volt gauge

    Everything @adriver just said above, plus also, turn up your idle from under 520RpM to over 620RpM.
  5. M

    Is This A PPV, An SSV, or What?

    Although you're ABSOLUTELY right about PPV & SSV tuning (which is more complex than ever), are y'all aware that the PPV's PCV system uses the Corvette PCV system (including much taller valvecovers), while all the other engines don't?
  6. M

    G80 not available with vehicles with optional StabiliTrak

    Yes. Cable = Physical = REAL = I control throttle, pcm must deal with MY WISHES! Signal = Electrical = I get to make suggestions to the throttle, ecm & tcm briefly discuss and then agree on what I meant, gottdamnt (this is why throttle fakers nearly always quicken the throttle somehow, and why...
  7. M

    Fuel efficiency drop in newer models ?

    6L80 8L90 & 10L80 prove that 4L60 was effectively wasting fuel in metro/urban stop'n'go ... GM almost always used 4L60's axle gear to bias the tradeoff toward highway MpG, sacrificing city MpG. If we use the axle to bias the tradeoff toward city MpG, we sacrifice some highway MpG. 8L90E x 3.23...
  8. M

    Little FYI

    He's too busy doing outstanding maintenance and repairs to have a signature that would answer. A left handed way of saying "I AM impressed, though" almost as impressive as a NYC livery driver I know whose 2011 Town Car has over 700,000 miles (and STILL counting) on the original Modular 4.6L V8...
  9. M

    Fuel efficiency drop in newer models ?

    Forgetting to multiply the gearbox ratios by the axle(s) ratio always creates problems. Also keep in mind that, from the 70s til the noughties, axle ratios for vehicles under about 7000lb were artificially pressured by CAFE MpG scores to be lower than desired. Speaking in terms of GMTs weighing...
  10. M

    DOD delete low oil pressure beat!

    Have you given any thought to enabling V4 mode only as an overheat mitigation measure, at or over 230F? Also, pics of louvered hood, please?
  11. M

    2002 yukon Z71 thermostat question

    You never once mentioned when you last replaced the radiator. I'd be pleasantly surprised if yours has lasted longer than a score / two decades! ... but in all that time, I guarantee it is running hotter than it did in its childhood. When the day comes for you to replace your radiator, it may...
  12. M

    Fuel efficiency drop in newer models ?

    Not poking holes, more like filling in holes ... 10L80: ... 4.69 ... 2.99 ... 2.15 ... 1.77 ... 1.52 ... 1.28 ... 1.000 ... 0.85 ... 0.69 ... 0.64 (7.32 Spread) 8L90E: ... 4.56 ... 2.97 .... 2.08 .... 1.69 . . . . . . . 1.27 ... 1.000 ... 0.85 . . . . . . . 0.65 (7.01 Spread) 6L90E: . . . . 4.03...
  13. M

    14 tahoe 4x4 poor fuel mileage help

    Engine bored out, VVT deleted ... neither of those things help MpG. Find a different tuner, have him sit next to you, while the laptop is recording realtime data during a lazy, low-load, non-enthusiastic drive. It may not be a tuning issue, but this provide better info than we can come up with.
  14. M

    G80 not available with vehicles with optional StabiliTrak

    StabiliTrak and the locker did not seem to work well together with a physical throttle. Once GM switched to signal throttle, maybe that made it easier to combine the locker and StabiliTrak?
  15. M

    Oil Pump Compatibility

    Let's all drink to that.
  16. M

    Oil Pump Compatibility

    Been priming in Clear Flood mode since the early naughties. Just prefer that the oil filter already have some oil in it first.
  17. M

    Oil Pump Compatibility

    You don't do this in the break room next to the coffee grinder, nor while cleaning out your vacuum cleaner, or in a bog. AFTER wiping down the bottle, then pouring oil into the filter, then adding the rest of the oil to the engine, I crank in Clear Flood mode.
  18. M

    2002 Tahoe e-fans and volt gauge

    One of the OTHER many things altered in the tune is as follows: When the electrical fans kick on, they can kick on LOW speed, or HIGH speed. (Older vehicles would be one fan=LOW, or both=HIGH.) If the AC psi is high enough, both electrical fans can go from off to HIGH in under a second. That...
  19. M

    2002 Tahoe e-fans and volt gauge

    Two part answer. Part 1. KG8 = 130A KG3 = 140A KG4 = 150A If the alternator's connector, connects to the new alternator, you're good to go. 2. Every GM vehicle I've ever owned got a pcm tune. One of the MANY things I get addressed, is turning up the idle from ≈500RpM, to about 600RPM. In and...
  20. M

    2002 Tahoe e-fans and volt gauge

    Your alternator is a KG8 = 130A. Next time you go to buy an alternator, LIE. Tell them you have a KG3 or KG4, so you'll get a stronger alternator. I upgraded to a KG3, and will not settle for a KG8 again. Next time I'll try for a KG4.
  21. M

    Is This A PPV, An SSV, or What?

    What's the VIN? If you don't want to share it with us, cut'n'paste your VIN in place of the Buick RoadMaster VIN. https://www.gmpartsgiant.com/vin-decoder.html?vin=1G4BR82P5SR425943 It's not as good as CompNine, but it's free. (I'm still trying to figure out which front torsion bars were used...
  22. M

    Tired front struts, already replaced the rear with Bilsteins (not available for the front)

    https://www.shocksurplus.com/products/bilstein-4600-monotube-gas-oem-shocks-front-pair-2007-2014-chevrolet-suburban-1500-2wd-4wd
  23. M

    2001 yukon denali 6.0 oil in cylinder 1 and 3

    Cylinders 1 & 3 only? And this likely has nothing to do with a head gasket.
  24. M

    2001 yukon denali 6.0 oil in cylinder 1 and 3

    Either the rings are letting oil in from the bottom, or valve seals are letting in oil from the top. How else would oil get inside a combustion chamber?
  25. M

    Emissions Test Issue

    No system can ever fail anyone it was never meant to protect. In case anyone was wondering about how the priorities of the Emissions Dept informs the rules they come up with.

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