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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. Hurricane Irma and Octane.

    By emeryz28,
    • 3 replies
    • 1k views

  2. Carven Progressive Series Cat Back 1 2

    By acc412,
    • 27 replies
    • 7.5k views

  3. Aftermarket Cooling Transmission pan

    By schmolf4,
    • 9 replies
    • 2.3k views

  4. Will any cat work?

    By DTOMKIDD,
    • 7 replies
    • 1.2k views

  5. GM Intake Question

    By thatryan,
    • 7 replies
    • 3.1k views

  6. Question for anyone who has changed their spark plugs

    By gone_fishing,
    • 12 replies
    • 10.5k views

  7. Stock internal power

    By 5.slowwracing,
    • 9 replies
    • 1.5k views

  8. 2017 6.2L Defective Exhaust Valve

    By Kardean,   
    • 10 replies
    • 9.4k views

  9. Intake manifold off with pics of intake valves with deposits. 1 2 3 4 11

    By gone_fishing,
    • 155 replies
    • 108.2k views

  10. 5.3L Intake and exhaust ports/bolts the same as on LT1?

    By RideZX6R,
    • 4 replies
    • 1.3k views

  11. Anyone try on3 performance turbo upgrade?

    By hardcore-gm,
    • 2 replies
    • 1.7k views

  12. Elite E2-X vs Moroso catch can 1 2 3

    By andreej,
    • 32 replies
    • 9.8k views

  13. plugged catalytic converter 2017 6.2 4000km

    By Kardean,   
    • 5 replies
    • 8.4k views

  14. Removing the CAT located after the mufffler

    By THE_Engineer,
    • 6 replies
    • 1.7k views

  15. L83 Valve cover torque spec?

    By jrob56,
    • 0 replies
    • 10.5k views

  16. Corsa sport vs touring muffler

    By drentlaw1,
    • 6 replies
    • 5k views

  17. 10,000 kms on 4.3 V6 1 2 3

    By Donstar,   
    • 32 replies
    • 7.6k views

  18. 2017 Silverado Z71 0-130 1 2

    By Gorske,
    • 18 replies
    • 3.6k views

  19. Driveshaft

    By Nasty,
    • 6 replies
    • 1.5k views

  20. Blowers

    By Tcop93,
    • 4 replies
    • 1.7k views

  21. Super 10 Muffler

    By connor_8_,   
    • 11 replies
    • 12.3k views

  22. Diy magnaflow side exit

    By joshc64311,
    • 14 replies
    • 6.2k views

  23. Oil filter observation

    By Bxnanaz,
    • 3 replies
    • 1.3k views

  24. No reverse

    By Zoomworms2,
    • 8 replies
    • 11.1k views

  25. Issue with either a sensor or i am being paranoid

    By BlackHawkZ71,
    • 4 replies
    • 946 views

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