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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. GDI Replacement

    By zzsnowman,
    • 1 reply
    • 1.4k views

  2. Transmission Purge and relearn function

    By flyingfool,
    • 1 reply
    • 1.1k views

  3. 2015 Silverado Lower control arm bolts and washers

    By jusd33,
    • 0 replies
    • 1.7k views

  4. 409 SS exhaust with Flowmaster muffler for $250

    By Ozer,
    • 11 replies
    • 2k views

  5. Exhaust Upgrade for 2019 Denali 6.2L

    By kris shirley,   
    • 7 replies
    • 5.1k views

  6. THrottle Re-learn Proceedure

    By flyingfool,
    • 9 replies
    • 68.9k views

  7. Gear change

    By cmysstailights,
    • 8 replies
    • 973 views

  8. 2016 transmission problems

    By Jupiter,
    • 2 replies
    • 1.6k views

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

    By desert,
    • 51 replies
    • 83.6k views

  10. 2019 Suburban Exhaust TIp(s)

    By ryabrams,   
    • 0 replies
    • 1.5k views

  11. 5.3 l83 6.2 L86 Cam Swap

    By Brooks Blake,   
    • 8 replies
    • 30.7k views

  12. Muffler Delete Flapper Question 1 2

    By tjd2003,
    • 21 replies
    • 14.2k views

  13. 6L80/6L90 Dismantle

    By Bob2C,
    • 0 replies
    • 687 views

  14. Is AMSOIL ATF preferred for the 6L80E? 1 2 3

    By Marztian,   
    • 30 replies
    • 49k views

  15. 2014 Silverado humming sound when in 4x4

    By G5150,
    • 1 reply
    • 812 views

  16. 6L80e tq converter going out, any info on aftermarket converters?

    By 00pooterSS,
    • 9 replies
    • 6.4k views

  17. Lifted 7” now have vibration 1 2 3

    By Matt Castro,
    • 38 replies
    • 8.9k views

  18. 2014 silverado weird transmission issue

    By andrew st.aubin,
    • 6 replies
    • 1.4k views

  19. 2014 Chevy exhaust manifold bolt torque

    By Ericpipes,
    • 3 replies
    • 8.5k views

  20. Transmission Fluid & Filter 1 2

    By mcr217,
    • 16 replies
    • 15.6k views

  21. Another 6speed transmission failure at 82,000

    By aanold,
    • 13 replies
    • 2.9k views

  22. Warranty denied due to lift on 18 silverado 1 2 3 4 5

    By Ted_Drury,
    • 72 replies
    • 12.3k views

  23. best tune/programmer and CAI for 2017 6.2L 1 2

    By Calvin Beres,
    • 26 replies
    • 40.3k views

  24. By-pass trans filter upgrade for 6/8/10 speeds 1 2

    By flyingfool,
    • 16 replies
    • 2.9k views

  25. Part number for Gen V camaro trans filter

    By flyingfool,
    • 1 reply
    • 644 views

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