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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.

2,741 topics in this forum

  1. Downsides to muffler shop vs kit?

    By papageoff,
    • 9 replies
    • 3.1k views

  2. 6.6L Duramax Diesel Engine Operating Characteristics

    By Retired Bob,
    • 1 reply
    • 731 views

  3. Resonators 2019 1500 Sierra

    By FRWYS & GRNS,
    • 9 replies
    • 2.1k views

  4. 14 Silverado 200k preventative maintenance

    By nathanh,
    • 7 replies
    • 15.2k views

  5. 2017 6 speed auto trans question

    By mtkawboy,
    • 6 replies
    • 1.3k views

  6. GRAWR question(s) 1 2

    By newbcakes,   
    • 17 replies
    • 5.2k views

  7. AFE twisted steel headers and y pipe 1 2

    By TruckStig,
    • 29 replies
    • 6.4k views

  8. Converter failing 2016 112,000

    By MarcuM,
    • 9 replies
    • 849 views

  9. Is this normal? 1 2

    By Mozzer,
    • 18 replies
    • 2k views

  10. X-fer case, diff fluid change?

    By papageoff,
    • 10 replies
    • 6.4k views

  11. Any ill effects from air filter box hose being loose? 1 2

    By Marv88,
    • 27 replies
    • 23.2k views

  12. Exhaust with no drone? 1 2 3 4 8

    By campbell45,
    • 105 replies
    • 79.8k views
    • AML
    • AML

  13. Catch Can install on 2018 6.2 Instructions

    By SSchup,
    • 3 replies
    • 810 views

  14. 4.3 LV3 Fuel Efficiency 1 2

    By Grumpy Bear,
    • 16 replies
    • 11.1k views

  15. 2018 GMC Denali swapping to 4.11 Gearing 1 2 3

    By DHeinze,   
    • 39 replies
    • 16.4k views

  16. eAssist with flow master or any after market exhaust

    By Djfrisk,   
    • 1 reply
    • 2.6k views

  17. 2014 Silverado How to Tune the Transmission?

    By wmgeorge64,
    • 12 replies
    • 33.5k views

  18. Changes in Transmission Oil Cooler Flush Requirements

    By Retired Bob,
    • 2 replies
    • 830 views

  19. Vacuum pump delete 1 2 3

    By shrekmoose,
    • 38 replies
    • 35.7k views

  20. Flex or e85 conversion kit 1 2

    By djxn40,
    • 17 replies
    • 18.9k views

  21. MSD Atomic LT1 intake swap on l83 1 2

    By 2017Sierra1500,   
    • 27 replies
    • 26k views

  22. 2wd to 4wd groaning noise

    By Vinnie Cantacessi,
    • 0 replies
    • 583 views

  23. 15 Denali - Shake and Bake Ricky Bobby - FIX 1 2

    By Cbell13055,
    • 15 replies
    • 2.4k views

  24. 17 5.3 ProCharger vs 16 5.3 e85 tune 1 2 3

    By Gorske,
    • 41 replies
    • 6.3k views

  25. overheating transmission solved

    By truckguy82,
    • 14 replies
    • 80.7k views

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