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  1. M

    Reduced Engine Power

    It's not that he thought it was NOT important, it's that he did not have immediate access to the code(s) yet, but had access to the other stuff. Funny thing going on here. Automakers all agreed upon a system where the Check Engine light comes on, instead of just showing the code(s) is (are) up...
  2. M

    Undercarriage Input

    Rim/Wheel size is irrelevant, so long as the tires' radius/diameter/circumference are all equal. ECM & TCM & 'posi' treat all the following tires as identical: 265/75R16 - 31.64" 265/70R17 - 31.60" 265/65R18 - 31.56" (tire wear notwithstanding, minuscule differences can be mitigated by adjusting...
  3. M

    Loose steering

    When you go for the alignment (unless the alignment tech is a dooftard), you'll find out if the steering box is loose. If on the other hand you're sure that the only steering play is in the box itself (I know you tested it up in the air, but my knees and back work fine up in the air) shop around...
  4. M

    Undercarriage Input

    Wish I'd the patience to be that weird, a 5-tire rotation is likely the wiser way to go. I normally only use spare when 'NEEDED', otherwise I leave spare alone and rotate the other 4 every oil change / 3000 miles. When it's time to replace a pair or quartet of tires, I keep the best of those as...
  5. M

    Undercarriage Input

    1st pic, upper left hand corner, looks like a frame-to-body bushing bolt, may wanna check on that. Your leaves and your spare wheel look like the rustiest things to check on. If the spare is over 6 years old, may want to replace it with a younger tire.
  6. M

    P0171 and P0174

    There've been times when my mech needed a crazyflexy straw and a bit of imagination to find a cleverly hidden leak ...
  7. M

    P0171 and P0174

    May need to check the intake manifold for OTHER leaks. It has several auxiliary fittings on it that may test well under pressure, but fail under vacuum, and every atmospheric intake manifold operates under vacuum. Also may want to recheck installation & tightening of various intake fittings...
  8. M

    2000 K1500 5.3 Fuel Pump Replacement

    https://www.gmpartsgiant.com/vin-decoder.html Indeed, this is how it should be done.
  9. M

    Monroe OESpectrum shocks - seem too short?

    Please let us know how you like those 5100s.
  10. M

    Keep driving your GMT800s?

    Should've tested the exhaust and intake separately. Also should've tested a tune written by a human being instead of a canned tune. Specifically, a custom tune, with a fully enabled Aussie operating system. Even so, Project Farm does it again.
  11. M

    2000 LQ4 Exhaust (solved - Walker 55556 from 2001 - blueprint verified)

    My Tahoe has a mere L59. I was merely suggesting a likely, compatible GM OE part, that could also be an upgrade.
  12. M

    2000 LQ4 Exhaust (solved - Walker 55556 from 2001 - blueprint verified)

    Would it be of any help if I suggested you examine LQ9 exhaust parts? If not, please ignore.
  13. M

    Monroe OESpectrum shocks - seem too short?

    There are basic 5100 versions for unleveled/unlifted suvs & pickups, as well as 5100s (5160s?) for lifted stuff.
  14. M

    Monroe OESpectrum shocks - seem too short?

    Indeed.
  15. M

    Gear ratio

    I don't tune GMT800s yet, so I can't say for sure yet, but I'd not be surprised to learn that GM slowed & dampened electronic throttle response; if that's the case, the delay does not have to be 'removed' entirely - it's another parameter that can be considerably tailored.
  16. M

    Gear ratio

    So, that'd be when your foot is past 33% TPS? 50% TPS? GM definitely made things very conservative unresponsive and discouraging under 50% TPS. Depending on how you normally drive the 5.3L, yes, even the Normal shift table can be made to better suit your specific tastes. If you've the sense to...
  17. M

    Gear ratio

    Decreasing Power Enrichment delay only results in less fuel economy if the driver 'takes advantage'. However, the prime purpose of Power Enrichment is cylinder cooling at sustained high loads, not more power - GM's PE AFR is a bit too rich to make much more power - 'more drivetrain wear' doesn't...
  18. M

    Gear ratio

    Don't take this personally, but I'm surprised this is still a question after over 25 years. That more GM V8 vehicles have not been tuned - even if NOT for more power / torque / throttle response! - is a failure on several fronts; clearly most people misunderstand how the GM OE 'tune' holds their...
  19. M

    Gear ratio

    The 4.3L V6 itself was cheaper, but GM apparently thought that it'd be cheaper to make an externally identical V8 to an LT1, maybe so that the LT1 wiring & pcm & various lines and stuff became perfectly redundant, to simplify and speed up the assembly line? Like I said, though, the L99 was...
  20. M

    My new truck 06 2500HD CCSB 6.0 4L80 4x4

    Can't remember when I was last in the back seat of my Tahoe, but it was not in '26 or '25, so I definitely don't remember seeing any floor HVAC stuff. I'll check ...

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