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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.

2,730 topics in this forum

  1. slight rattle at cold start

    By GsBowtie,
    • 11 replies
    • 44.3k views

  2. Delete

    By Bryan Norman,
    • 0 replies
    • 774 views

  3. L83 and BTR Stage 3 Cam

    By Bryon1976,
    • 4 replies
    • 7.3k views

  4. Misfire cyl 7 but not collapsed lifter-Bad gas?

    By Payton34,
    • 3 replies
    • 1.2k views

  5. Factory L86 cam swap to L83 BTR cam. Is it possible, why would you do it?

    By KindalikeKane,
    • 13 replies
    • 12k views

  6. Drive Train Maintenance

    By IGG,
    • 2 replies
    • 1.3k views

  7. Should I do dod delete kit or just replace with AFM lifters

    By Payton34,
    • 2 replies
    • 7.7k views

  8. Bio-diesel for 2016 Duramax?

    By Mike Hamm,
    • 1 reply
    • 748 views

  9. P0420 p0430 Kooks Headers

    By Buddy B,
    • 1 reply
    • 992 views

  10. Good Transmission Builder in Indiana

    By dseef03,
    • 3 replies
    • 1.1k views

  11. 2014 Silverado transmission flush or drain? 1 2 3

    By GMcD,
    • 41 replies
    • 179.8k views

  12. Is anyone using Lucas Synthetic Oil Stabilizer in their 5.3 1 2

    By No Tyme,
    • 18 replies
    • 38.9k views

  13. Typical GM transmission problems rant/questions

    By Zayne Snyder,
    • 0 replies
    • 1.4k views

  14. P0420 (catalyst efficiency below threshold) code keeps coming back!

    By Guinnessmike,   
    • 4 replies
    • 16.1k views

  15. Cel dod delete

    By Buddy B,
    • 5 replies
    • 2.2k views

  16. 2015 5.3L seized another lifter 40K miles and 2 years later

    By Mathew Kirsch,
    • 8 replies
    • 1.6k views

  17. 6L90 differences and compatibility 2009/2016 model years

    By M W Moore,
    • 1 reply
    • 4.9k views

  18. EBCM update.

    By Swish88,
    • 0 replies
    • 1.1k views

  19. Driveshaft removal

    By Shovelshort,
    • 3 replies
    • 1.3k views

  20. 5.3L Water Pump Torque Spec

    By lawnboy-5247,
    • 4 replies
    • 52.4k views

  21. 2014 l83 Sierra

    By Bettywhite,
    • 0 replies
    • 501 views

  22. Kooks y pipe problems

    By m1c,
    • 10 replies
    • 1.8k views

  23. 2016 Suburban, 6L80E out at 81k. 1 2

    By Black02Silverado,
    • 15 replies
    • 8.4k views

  24. 2016 Sierra spark plugs, wiring , coils

    By Hendrikjan,
    • 2 replies
    • 1.3k views

  25. 2014 Sierra 1500 5.3 Standard Lifter Failure

    By desertcomm,
    • 4 replies
    • 9.4k views
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