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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. 4.6 vs. 5.3- potential buyer 1 2 3

    By bamafan76,
    • 41 replies
    • 25.6k views

  2. Transmission pan and diff cover upgrades

    By SilveradoKeydet11,   
    • 3 replies
    • 1.6k views

  3. Exhaust on my 16 Sierra 5.3 1 2

    By tbmaciii,
    • 18 replies
    • 4.8k views

  4. 5.3 blown lifter @ 85000 km!!

    By Martiallterrain,   
    • 5 replies
    • 5.1k views

  5. 2017 5.3 ProCharger times

    By Gorske,
    • 4 replies
    • 1.3k views

  6. Engine calls for 5W-30, they put in 0W-20, does it matter? 1 2

    By Knightfall,
    • 18 replies
    • 34.7k views

  7. 2017 Silverado 5.3 ProCharger 0-100 1 2

    By Gorske,
    • 16 replies
    • 10k views

  8. Exhaust whistle

    By CiscoBetancourt,   
    • 1 reply
    • 632 views

  9. Corsa Sport, vs GM performance Corsa 6.2

    By Crobinson16,   
    • 2 replies
    • 1.8k views

  10. L8B conversion?

    By hizzo3,
    • 0 replies
    • 2.4k views

  11. Muffler/Exhaust Options 1 2

    By Western96,
    • 24 replies
    • 7.1k views

  12. 2018 Exhaust question

    By Rich7930,
    • 1 reply
    • 938 views

  13. 5.3L vs 6.2L in 2018 Silverado 1 2

    By zettiefan,   
    • 21 replies
    • 48.9k views

  14. Looking for LT1 IM and TB.

    By 16rcsb_dom,
    • 6 replies
    • 920 views

  15. 4WD low in reverse

    By Lison,   
    • 5 replies
    • 967 views

  16. It Has Arrived!!!!! 1 2 3

    By Gorske,
    • 39 replies
    • 4k views

  17. Brake Job Experience & Advice

    By Darksky,
    • 12 replies
    • 1.9k views

  18. L83 Ecotec3 aftermarket Intake Manifold?

    By Steelephillips,
    • 7 replies
    • 17.2k views

  19. Fuel Filler Neck Size

    By kivetts04dmax,
    • 1 reply
    • 3.5k views

  20. coolant smell in cab

    By Cheekster96,
    • 0 replies
    • 747 views

  21. E85 in the 4.3 Ecotec3, Yes or No? 1 2 3 4 5

    By tim5779,   
    • 69 replies
    • 36.5k views

  22. 2017 Ecotoc 4.3 sound

    By tim5779,
    • 7 replies
    • 1.2k views

  23. Oil Filter for 2014+ conflicting info. 1 2

    By dbrobins27,
    • 17 replies
    • 16k views

  24. 2014 Sierra Denali 6.2 bent push rod problem

    By jca1972,
    • 1 reply
    • 4.8k views

  25. Spare TCM for 8 speed tuning

    By Crimson6.2L,
    • 9 replies
    • 6.3k views
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