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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.

2,739 topics in this forum

  1. Intake swap tuning

    By Tech89,
    • 4 replies
    • 5.4k views

  2. 17’ GMC 6.2 Whipple keeps blowing rear main seal 1 2

    By Tanner Smith,
    • 15 replies
    • 8.9k views

  3. 2018 Chevy Silverado rear end clunk

    By 18ltz19,
    • 1 reply
    • 924 views

  4. Why does my 2500 scan a 3500

    By Jennifer432,
    • 2 replies
    • 614 views

  5. Oil Question

    By cjlet,
    • 11 replies
    • 1.9k views

  6. 2017 Silverado 5.3 - v4 rumbling/clanking

    By Dpbeats11,
    • 3 replies
    • 897 views

  7. 6L80/90 do you have a problem?

    By pokismoki,
    • 6 replies
    • 1.5k views

  8. 2014 Chevy Silverado - Oil pressure problem?

    By andiegirl,
    • 4 replies
    • 15.1k views

  9. Transmission Fluid

    By Vom Breezy,
    • 1 reply
    • 1k views

  10. Oil burning, where is it going? 1 2 3

    By truckguy82,
    • 35 replies
    • 12.2k views

  11. Rear-end clunk

    By ChaseC,
    • 0 replies
    • 822 views

  12. 17’ Sierra 6.2 Whipple Supercharged Water/Meth kit worth it?

    By Tanner Smith,
    • 12 replies
    • 7.9k views

  13. 10-Speed Transmission HELP - Is dealer telling me the truth?

    By Nevvermind183,
    • 8 replies
    • 10k views

  14. 2016 Silverado 1500 5.3 tranny whine 1 2

    By Twerking,
    • 22 replies
    • 14.4k views

  15. 2015 5.3L engine mods

    By James Savage,
    • 5 replies
    • 5.9k views

  16. 2017 Sierra 6.2 CC SLT with max tow. What are my axel weight ratings?

    By Offspring22,
    • 3 replies
    • 919 views

  17. UPDATE Removed Overloads 1 2

    By lucas287,
    • 17 replies
    • 14.8k views

  18. Transmission issue

    By Caleb Meyer,
    • 5 replies
    • 1.4k views

  19. New spark plugs and wires for the 100k 2015 Silverado. Hows the plugs look?

    By mitchely03,
    • 1 reply
    • 1.5k views

  20. Transmission (whine) Help?

    By Heather Killgrove,
    • 1 reply
    • 1.4k views

  21. P129F- Fuel Pump Driver Control Module/Fuel Pump Speed Signal Incorrect

    By Mtzcesar65,
    • 0 replies
    • 15.1k views

  22. 17' 6.2 Whipple Supercharged Catch Can excessive oil in catch can

    By Tanner Smith,
    • 8 replies
    • 3.5k views

  23. PCV

    By M1ck3y,
    • 7 replies
    • 9k views

  24. 2018 5.3 oil pan area leak 1 2

    By Trucker84,
    • 23 replies
    • 26.4k views

  25. 2016 chevy silverado 4.3L EcoTec3 V6

    By Robert9473,
    • 1 reply
    • 1.1k views
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