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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.

2,728 topics in this forum

  1. P0740 and High Trans Temp

    By Jonathan Annear,
    • 8 replies
    • 1.3k views

  2. Throttle body upgrade? 1 2

    By rae185,
    • 20 replies
    • 27.7k views

  3. Intake valve build up - Pics Inside 1 2 3 4

    By JLaw297,
    • 57 replies
    • 10.4k views

  4. Speed Engineering Headers Review

    By VdellaV,   
    • 2 replies
    • 21.6k views

  5. 2019 Chevy silverado

    By Deadmandriller,
    • 4 replies
    • 765 views

  6. Oil change intervals 1 2 3 4 11

    By MarcuM,
    • 156 replies
    • 35.4k views

  7. Rear Axle size

    By abnexus,
    • 1 reply
    • 16.7k views

  8. Shudder: Root cause (1) at higher mileage

    By Zack Coles,   
    • 2 replies
    • 2.2k views

  9. Camshaft Failure

    By SeekAndDestroy,
    • 2 replies
    • 6.3k views

  10. Flapper Removed Clip

    By Byrds8,
    • 9 replies
    • 1.3k views

  11. Corsa PowerCore Filter

    By RickRock,
    • 3 replies
    • 687 views

  12. 2018 Silverado E assist.... tuned by BBP

    By Christian Olguin,
    • 2 replies
    • 4.6k views

  13. Routine maintenance

    By meirikm,
    • 9 replies
    • 1.6k views

  14. Power folding mirrors and reverse tilt at the same time

    By Clarkem1,
    • 3 replies
    • 895 views

  15. Truck struggling and some form of whining noise

    By cubangt,
    • 13 replies
    • 6.9k views

  16. Sprint booster throttle enhancer for sale $180 shipped

    By pokismoki,
    • 3 replies
    • 760 views

  17. Exhaust Tips

    By bayouguy71,
    • 2 replies
    • 876 views

  18. Best oil for the 5.3 1 2 3 4

    By Crutter,
    • 51 replies
    • 185.3k views

  19. Instead of catch can, why not delete PCV? 1 2 3 4 13

    By SquireSCA,
    • 181 replies
    • 50.3k views

  20. Hp fuel pump terminal connector

    By Brad Young,
    • 0 replies
    • 470 views

  21. 2014 Tahoe dash gone wild...

    By Kevin Andrews,
    • 0 replies
    • 515 views

  22. Talk Me Into Installing This Borla Atak

    By alodawg26,   
    • 13 replies
    • 8.8k views

  23. Torque App, gear selector PID 1 2

    By flyingfool,
    • 17 replies
    • 19.8k views

  24. L83 intake manifold swap 1 2 3

    By romeoortiz92,
    • 31 replies
    • 63.5k views

  25. Muffler delete mod

    By timber74wolf,
    • 0 replies
    • 925 views
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