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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.

2,727 topics in this forum

  1. Rear Differential Hum (doesn't know the words)

    By fastx021,
    • 2 replies
    • 849 views

  2. sure cool 6l80

    By plasteryou,
    • 5 replies
    • 1.8k views

  3. L96 questions 1 2

    By TheCaddyMan04,
    • 20 replies
    • 12.5k views

  4. Oil type for 2014 Sierra 5.3 1 2 3 4 8

    By Green 1364,
    • 113 replies
    • 114.1k views

  5. Looking for a shop around columbia / Sumter SC that does installs the actual AFM delete kits

    By boudan joe,
    • 4 replies
    • 1k views

  6. trans thermostat gaskets

    By plasteryou,
    • 2 replies
    • 1.9k views

  7. Transmission overheating 1 2 3

    By dsm1995gst,
    • 33 replies
    • 11.6k views

  8. Pcv push tab connections same from newest gen to last model?m

    By Patrick G,   
    • 0 replies
    • 895 views

  9. 2015 Sierra 6.2 DOD/AFM delete reliability?

    By kojimep,
    • 3 replies
    • 2.5k views

  10. Long-Term Torque Converter Replacement Feedback for M5U Transmissions

    By JoeT1224,
    • 0 replies
    • 1.1k views

  11. 5.3 fireing order

    By joshc64311,
    • 13 replies
    • 45.9k views

  12. Catch can lines were reversed for 100 miles?

    By Payton34,
    • 1 reply
    • 979 views

  13. should I turn off AFM again after new lifters installed

    By Payton34,
    • 2 replies
    • 1.6k views

  14. Raybestos Element3 hybrid brake pads, anyone have experience?

    By columrick,
    • 7 replies
    • 26k views

  15. Replacing HPFP, need help finding TDC

    By NC_87,
    • 3 replies
    • 10k views

  16. 6L80 transmission failure - my rebuild experience

    By pixelmonkey,
    • 4 replies
    • 2.7k views

  17. Check engine, traction control lights and low power mode

    By Kbert1171,
    • 2 replies
    • 814 views

  18. Engine oil grades

    By Hendrikjan,
    • 7 replies
    • 1.8k views

  19. Differential for the snow

    By jim17,
    • 5 replies
    • 992 views

  20. Gear ratio calculator

    By Giggity231,
    • 9 replies
    • 1.6k views

  21. MBRP Exhaust

    By J.H.2015LT,
    • 13 replies
    • 2.3k views

  22. 2015 1500 - 5.3 Lifters Bad w/ Bad Cam

    By IDriveATruck,
    • 4 replies
    • 1.2k views

  23. slight rattle at cold start

    By GsBowtie,
    • 11 replies
    • 44.1k views

  24. Delete

    By Bryan Norman,
    • 0 replies
    • 769 views

  25. L83 and BTR Stage 3 Cam

    By Bryon1976,
    • 4 replies
    • 7.2k views

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