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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.

2,739 topics in this forum

  1. Clunk from rear end/differential

    By lawnboy-5247,
    • 2 replies
    • 757 views

  2. Clunk from rear end/differential

    By lawnboy-5247,
    • 1 reply
    • 866 views

  3. 2018 5.3 Yukon idle flutter at the stop in Drive

    By dvzzz,
    • 2 replies
    • 2.6k views

  4. P0307 Code / engine light

    By JHall- va,   
    • 7 replies
    • 1.1k views

  5. 2014-2018 Silverado True Dual Help!! New Member

    By Klein Wilhelmi,
    • 10 replies
    • 7.9k views

  6. Transmission issue

    By Rosie A&P,
    • 5 replies
    • 809 views

  7. GM Gen V Builder guide

    By DenaliX14,
    • 7 replies
    • 3.5k views

  8. **Can't find my manual 2016 5.3 oil capacity**

    By arkenzo,
    • 14 replies
    • 110.5k views

  9. Long Tubes + Double X-Pipes and Magnaflow Magnapacks

    By VdellaV,   
    • 7 replies
    • 4.2k views

  10. How To Clean Performance Intake Filter

    By thatryan,
    • 4 replies
    • 9.4k views

  11. Borla GM Performance exhaust 19329322

    By NE-KID,
    • 4 replies
    • 1.8k views

  12. 2019 Stock Exhaust on 2015 Sierra

    By fatdaddy35,
    • 2 replies
    • 554 views

  13. High flow performance exhaust that’s also quiet?

    By Cody425,
    • 6 replies
    • 836 views

  14. Motofab leveling kit - Alignment Issue?

    By A Bearded Patriot,   
    • 5 replies
    • 5.4k views

  15. How much coolant...

    By Doublebase,
    • 14 replies
    • 1.3k views

  16. Drivetrain weakpoint?

    By Cody425,
    • 11 replies
    • 988 views

  17. Stutter, MIL Lamp flashes and then turns off

    By Cf1k1,
    • 0 replies
    • 412 views

  18. CAI, catback, dyno tune results (add headers &PTB?) 1 2

    By HogWild26,
    • 15 replies
    • 16.7k views

  19. Engine chugging

    By George page,
    • 5 replies
    • 7.4k views

  20. New header install 1 2

    By Znation,
    • 18 replies
    • 4k views

  21. Strange oil pressure change

    By FlipZ71,
    • 11 replies
    • 1.2k views

  22. Super 10 dual exhuast

    By Hypercane,
    • 5 replies
    • 1.1k views

  23. Transmission issues

    By allgonoshow2,
    • 6 replies
    • 5.1k views

  24. New to the 6.2l world- Have some Questions 1 2 3 4

    By Charles P.,   
    • 52 replies
    • 4.2k views
    • Z45
    • Z45

  25. Anyone added significant horsepower to their 4.3? 1 2 3 4

    By Donstar,
    • 55 replies
    • 26.3k views
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