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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. 6L90 differences and compatibility 2009/2016 model years

    By M W Moore,
    • 1 reply
    • 5k views

  2. EBCM update.

    By Swish88,
    • 0 replies
    • 1.1k views

  3. Driveshaft removal

    By Shovelshort,
    • 3 replies
    • 1.4k views

  4. 5.3L Water Pump Torque Spec

    By lawnboy-5247,
    • 4 replies
    • 53.6k views

  5. 2014 l83 Sierra

    By Bettywhite,
    • 0 replies
    • 513 views

  6. Kooks y pipe problems

    By m1c,
    • 10 replies
    • 1.8k views

  7. 2016 Suburban, 6L80E out at 81k. 1 2

    By Black02Silverado,
    • 15 replies
    • 8.6k views

  8. 2016 Sierra spark plugs, wiring , coils

    By Hendrikjan,
    • 2 replies
    • 1.4k views

  9. 2014 Sierra 1500 5.3 Standard Lifter Failure

    By desertcomm,
    • 4 replies
    • 9.4k views

  10. 2017 Silverado 1500 P06DA problems

    By James Noh,
    • 0 replies
    • 4.4k views

  11. Oxygen Sensor Problems - all 4

    By Rafal Styczen,
    • 1 reply
    • 1.3k views

  12. 2017 Sierra Double Cab 5.3l Failed Lifter

    By Gdt sierra,
    • 0 replies
    • 795 views

  13. 6L80E transmission shift problem 1 2 3

    By Larsson,
    • 32 replies
    • 42.1k views

  14. Transmission hose/line identification

    By Datwhitez71,
    • 13 replies
    • 1.9k views

  15. 2017 Sierra SLE 5.3 back from tune 1 2 3 4

    By RMR,
    • 46 replies
    • 11.8k views

  16. Borla ATAK Exhaust & CAI

    By CrunchyBlack,
    • 10 replies
    • 4.6k views

  17. Second 6l80 trans died today 1 2 3

    By 2015 High Miler,
    • 36 replies
    • 5.8k views

  18. E85 14’ sierra 4.3 Run e85 or stick with regular gass

    By TwentyEighthNight,   
    • 8 replies
    • 8.7k views

  19. 2017 Silverado 1500 - LT to LS 427 engine Swap 1 2 3

    By Blackwidow_Chevy,   
    • 37 replies
    • 20.3k views

  20. Pacesetter Headers?

    By SeekAndDestroy,
    • 13 replies
    • 3.9k views

  21. 2016 5.3l oil pressure change

    By olerodder,
    • 11 replies
    • 19.8k views

  22. Turbowerx Pump Issue

    By Regan Menzies,
    • 0 replies
    • 579 views

  23. 2015 Chevy Silverado 5.3 Oil Pan Gasket (Help finding part Number)

    By GoneGetSMOKED,
    • 3 replies
    • 7.4k views

  24. Any high mileage guys towing travel trailers? 1 2

    By RPaul,
    • 16 replies
    • 2.2k views

  25. 8spd transmission w/ lift kit and larger tires

    By GraphiteSilveradoZ71,
    • 6 replies
    • 1.6k views
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