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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. All Terrain Gears

    By Jcriss88,
    • 1 reply
    • 639 views

  2. True duals on a 6.2l

    By Trenton Shelton,
    • 3 replies
    • 1.4k views

  3. Remote Start Occasionally Does Not Work

    By BlaineBug,
    • 12 replies
    • 10.9k views

  4. 2016 Silverado with Kumho MTs

    By slvrsky07,
    • 13 replies
    • 3.5k views

  5. New to me truck, Error Code.....

    By zmwatson18,
    • 2 replies
    • 1.8k views

  6. Exhaust recommendations. 1 2

    By WilliamBos,
    • 16 replies
    • 4.5k views

  7. Wanting to change all fluids - this a good idea?

    By Waffle34,
    • 8 replies
    • 2.1k views

  8. Parts needed to do front and back re gear differentials

    By Brumageq,
    • 10 replies
    • 1.6k views

  9. Oil Filter Relocation Question for U Engine Guys 1 2

    By TxVet33,
    • 21 replies
    • 2.5k views

  10. LT5 TB to l83 Manifold adapter?

    By flyingfool,
    • 3 replies
    • 1.2k views

  11. My catch can experiment (L83) 1 2 3

    By SinisterZ71,
    • 33 replies
    • 29.9k views

  12. 2014 Drive belt replacement.

    By mongoose71,
    • 2 replies
    • 1.1k views

  13. Can you shorten a Corsa catback to work on a short bed?

    By 04GMshorty,
    • 2 replies
    • 824 views

  14. GDI Replacement

    By zzsnowman,
    • 1 reply
    • 1.4k views

  15. Transmission Purge and relearn function

    By flyingfool,
    • 1 reply
    • 1.2k views

  16. 2015 Silverado Lower control arm bolts and washers

    By jusd33,
    • 0 replies
    • 1.7k views

  17. 409 SS exhaust with Flowmaster muffler for $250

    By Ozer,
    • 11 replies
    • 2.1k views

  18. Exhaust Upgrade for 2019 Denali 6.2L

    By kris shirley,   
    • 7 replies
    • 5.3k views

  19. THrottle Re-learn Proceedure

    By flyingfool,
    • 9 replies
    • 72k views

  20. Gear change

    By cmysstailights,
    • 8 replies
    • 1k views

  21. 2016 transmission problems

    By Jupiter,
    • 2 replies
    • 1.6k views

  22. hollowing out the 3rd cat 1 2 3 4

    By desert,
    • 51 replies
    • 84.8k views

  23. 2019 Suburban Exhaust TIp(s)

    By ryabrams,   
    • 0 replies
    • 1.6k views

  24. 5.3 l83 6.2 L86 Cam Swap

    By Brooks Blake,   
    • 8 replies
    • 31.5k views

  25. Muffler Delete Flapper Question 1 2

    By tjd2003,
    • 21 replies
    • 14.3k views
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