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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. 2016 silverado 5.3 v8 1 2

    By Ltz4 me?,
    • 19 replies
    • 3.7k views

  2. Advice on 2014 silverado 4*4, crew cab, 5.3L

    By jwm2201,
    • 3 replies
    • 1.1k views

  3. 2018 Silverado 4WD Issue with truck and dealership, potential case

    By Kvnsky,
    • 0 replies
    • 572 views

  4. 2015 Yukon Denali 6.2 trans problem

    By zmnypit,
    • 9 replies
    • 6k views

  5. Overheating Transmission 1 2

    By Maine-iac,
    • 15 replies
    • 4k views

  6. radiator leak heads up

    By roadkill5.3,
    • 3 replies
    • 2.1k views

  7. 14 Silverado stuck in 4wd

    By Jnick75,
    • 5 replies
    • 1.5k views

  8. What oil are you guys running ? 1 2 3 4 6

    By Matt Prior,
    • 79 replies
    • 15.1k views

  9. Transmission Cooler Upgrades?

    By BCMoto,
    • 3 replies
    • 1.3k views

  10. Flowmaster

    By M1ck3y,
    • 2 replies
    • 875 views

  11. Broken Pushrod... Now a big repair 1 2 3

    By DENALIHD66,
    • 43 replies
    • 17k views

  12. 6.2 L86 vs 2018 Corvette engine 1 2

    By SRT8dan,   
    • 17 replies
    • 18.5k views

  13. Tranfer case Duramax

    By Jussi Lofberg,
    • 2 replies
    • 799 views

  14. Engine noise on 2014

    By G4Bama,
    • 5 replies
    • 1.2k views

  15. UPR Catch Can Plug N Play with CSS Installed 1 2 3 4 9

    By 89stroker,
    • 133 replies
    • 41.7k views

  16. Oil catch can? 1 2 3 4 125

    By C25A1guy,
    • 1.9k replies
    • 370.9k views

  17. My current exhaust setup: 2015 Silverado 5.3l

    By mitchely03,
    • 2 replies
    • 1.4k views

  18. 2016 45K service recommendations

    By ChopZ71,
    • 8 replies
    • 3.8k views

  19. Flex Fuel Conversion 1 2 3 4 5

    By Stonehenge,
    • 61 replies
    • 26.1k views

  20. HPtuners fan on/off points 1 2 3

    By flyingfool,
    • 40 replies
    • 18.5k views

  21. 2015 Sierra FHO RPO CODE but has flex fuel sensor

    By Supermofool,
    • 3 replies
    • 4.6k views

  22. Want to go E85 on my 16 Sierra CC 4x4 6.2L 1 2 3 4 5

    By TJay74,
    • 61 replies
    • 26.3k views

  23. Tranny Pill Flip - Too Cold?

    By SeekAndDestroy,
    • 6 replies
    • 7.3k views

  24. Now I know to turn off Stabilitrack in deep snow...

    By mikeyk101,
    • 3 replies
    • 1.6k views

  25. Gears

    By meirikm,
    • 1 reply
    • 801 views
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