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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. 2013 or 2018

    By Moose07,   
    • 10 replies
    • 1.6k views

  2. 2014 5.3l check engine flash when going up hill 1 2

    By Elmer-spud,
    • 15 replies
    • 7.3k views

  3. Leaf Springs

    By rlcole321,
    • 5 replies
    • 1k views

  4. Gears 1 2

    By meirikm,
    • 25 replies
    • 2.4k views

  5. 8L90 Fluid Capacity for Flush 1 2

    By 6.2Creedmoor,
    • 15 replies
    • 49.5k views

  6. 2015 5.3 header/y-pipe w cats kit

    By 2015 High Miler,
    • 8 replies
    • 4.5k views

  7. Lifter tick or Rod knock noise?

    By Santiago Lopez,   
    • 7 replies
    • 16.3k views

  8. Just put the wrong oil in.....have a road trip tomorrow. Cancel or let it rip? 1 2 3 4

    By 2kwik4u,
    • 47 replies
    • 8.7k views

  9. Will Borla XR1 with headers no cats drone 1 2

    By JONBLARC7,
    • 20 replies
    • 7.3k views

  10. 2018 5.3 6l80 and Torque Converter Stumbling

    By PNWSierra,
    • 3 replies
    • 10.1k views

  11. Nitrous set up

    By meirikm,
    • 0 replies
    • 1.1k views

  12. 2014 Silverado code p06dd

    By Scott O,
    • 1 reply
    • 850 views

  13. Stock Turbo comparabilities?

    By meirikm,
    • 8 replies
    • 1.2k views

  14. Swapping 2500 axles into 16 Silverado 1500 4x4?

    By 53boy,
    • 2 replies
    • 1.1k views

  15. Who's got rear sway bars installed? 1 2 3 4

    By arkenzo,
    • 54 replies
    • 29.9k views

  16. Supercharger/procharger options for 2015 sierra 5.3

    By 15GMCALLTERRIAN,
    • 10 replies
    • 3.1k views

  17. 17' GMC Sierra 6.2 Long Tubes and Y Pipe?

    By Tanner Smith,
    • 1 reply
    • 857 views

  18. Good air intake brand

    By SARNCAN,
    • 14 replies
    • 2.1k views

  19. Bolt On Straight Pipe Exhaust

    By countryhick,
    • 3 replies
    • 1k views

  20. CFM numbers for Throttle bodies

    By flyingfool,
    • 11 replies
    • 3.6k views

  21. Warranty up. What next? 1 2

    By tyler.frost92,
    • 28 replies
    • 3.3k views

  22. Gears Magazine

    By flyingfool,
    • 0 replies
    • 493 views

  23. Amsoil fluids and quantities

    By Waffle34,
    • 8 replies
    • 1.7k views

  24. All Terrain Gears

    By Jcriss88,
    • 1 reply
    • 625 views

  25. True duals on a 6.2l

    By Trenton Shelton,
    • 3 replies
    • 1.4k views
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