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Engines & Drivetrain

Tech for the 5.3L (L83), 6.2L (L86), and 4.3L V6. Tuning and 6L80 / 8L90 transmission support.

2,740 topics in this forum

  1. 3.73, 4.10 or 4.56 with 35's possibly 37's

    By Cliff14Denali,
    • 12 replies
    • 5.6k views

  2. 6.2 Dyno with Common Bolt-ons 1 2 3 4 5

    By Jon A,
    • 70 replies
    • 108.8k views

  3. 2014 5.3 L83 AFM Lifter ate my cam - Crank Damage

    By Czar97,
    • 8 replies
    • 13.1k views

  4. 2016 Sierra / Silverado factory cpi 3rd catalytic converter

    By Blueknight304,
    • 0 replies
    • 587 views

  5. Poll: How has your 8-speed been for you? 1 2 3

    By dkjbama,
    • 43 replies
    • 15.8k views

  6. 2017 6.2l coolant leak

    By BAU,
    • 8 replies
    • 13.1k views

  7. 2018 Silverado Cam upgrade

    By Blake0567,
    • 1 reply
    • 2k views

  8. Towing MPG

    By doctorofpain,
    • 10 replies
    • 1.3k views

  9. Muffler & Resonator Delete, 2014 5.3L

    By btj_z71,   
    • 10 replies
    • 20.5k views

  10. ANYONE have stock Y-pipe? Longtube headers trade.

    By NEMESIS-A/T,
    • 10 replies
    • 2.4k views

  11. 6 speed having same issues as 8 speed

    By Jarneson,
    • 11 replies
    • 1.6k views

  12. 2017 Fans staying on

    By gapple12,
    • 3 replies
    • 648 views

  13. 2014 - 2018 1500 GM HOW TO: Remove Intake Manifold

    By DenaliX14,   
    • 1 reply
    • 41.3k views

  14. Normal Engine Temp?

    By bmartinez2086,   
    • 1 reply
    • 7.1k views

  15. Dropped glove box screw

    By Ttiros,
    • 3 replies
    • 3.6k views

  16. 2015 Silverado 6.2l Low Trans Temp 1 2

    By Bryn7471,
    • 20 replies
    • 10.2k views

  17. Transmission issue Pip5175c

    By jvanwinkle2,
    • 0 replies
    • 1.3k views

  18. Cabin air filter upside down

    By Ttiros,
    • 2 replies
    • 4k views

  19. 2016 Silverado Tapping Noise

    By Karsus,   
    • 9 replies
    • 28.1k views

  20. 2014 - 2018 1500 GM HOW TO: Remove Fuel Injectors

    By DenaliX14,   
    • 0 replies
    • 20.8k views

  21. 2014 - 2018 GM HOW TO: Remove Air Box Assembly.

    By DenaliX14,   
    • 0 replies
    • 10.2k views

  22. Max tow pig rad in a non-max tow pkg truck

    By Thunderbone,
    • 1 reply
    • 640 views

  23. Spark Plugs and Wires Replacement/Upgrade

    By Darksky,   
    • 9 replies
    • 20.8k views

  24. 8 speed transmission TSB flush

    By askibum02,
    • 8 replies
    • 6.2k views

  25. Magnaflow on 2018 6.2l 8-speed 1 2

    By cruzcode,
    • 19 replies
    • 5.2k views
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