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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.

2,741 topics in this forum

  1. 8 spd full flush and filter change recommendation, pricing, TSB#, 2016 1 2 3

    By DeathByNissan55,   
    • 38 replies
    • 37.7k views

  2. Thoughts on this "Stage 1" before adding Whipple during "Stage 2"

    By ralphsmithiii,
    • 8 replies
    • 2k views

  3. Cab and chassis dual fuel tank

    By Ericoli931,
    • 5 replies
    • 16.6k views

  4. 6 Speed vs 8 Speed Reliability 1 2 3

    By SilveradoCustom,
    • 34 replies
    • 107.3k views

  5. 2016 bds steering stabilzer bracket install

    By Rich Ryan,
    • 1 reply
    • 466 views

  6. Intake Valves Cleaning Procedure

    By SARNCAN,
    • 10 replies
    • 18.8k views

  7. Exhaust flapper valve on 2019+

    By SquireSCA,
    • 1 reply
    • 524 views

  8. 180 Thermostat Results (With Towing Data) 1 2 3 4 7

    By Jon A,
    • 97 replies
    • 50.3k views

  9. Looking for vss and or speedometer wire for speed

    By Eric Grenier,
    • 5 replies
    • 530 views

  10. Side exit exhaust pics wanted

    By mitchely03,
    • 12 replies
    • 9.3k views

  11. Gas station selling 93 but not 93 1 2

    By truckguy82,
    • 19 replies
    • 1.6k views

  12. Headers/cats question 1 2

    By Jwal23,
    • 23 replies
    • 9.4k views

  13. traction bars , stealthiest looking

    By flyingfool,
    • 12 replies
    • 6.6k views

  14. Difference between GM's performance CAI's for the 2019 6.2L- 2 PN's now 1 2

    By SierraStorm21,
    • 21 replies
    • 9.6k views

  15. 2015 5.3L 3.42 Axle Ratio; Travel Trailer Max Tow Weight? 1 2

    By EddieK82,
    • 15 replies
    • 14.5k views

  16. Procharger Install on 2018 6.2L 1 2 3

    By JDNairn6.2L,
    • 33 replies
    • 11.2k views

  17. 2019 Silverado trans fittings

    By Mel Rich,
    • 1 reply
    • 451 views

  18. Pedal Commander worth it? 1 2

    By Crimson6.2L,
    • 17 replies
    • 40.3k views

  19. Engine Air Leak from PCV Tube

    By Retired Bob,
    • 1 reply
    • 3.5k views

  20. Question about pickup I just purchased

    By Jjstandardz,
    • 12 replies
    • 1k views

  21. Lunchbox locker for SIlverado

    By flyingfool,
    • 1 reply
    • 843 views

  22. 10 Speed Auto Question

    By Glava2876,
    • 2 replies
    • 590 views

  23. Magnaflow 18 vs 22: difference in sound?

    By Omarios,   
    • 1 reply
    • 4.5k views

  24. Speed engineering cat less ypipe fitment to corsa catback

    By Chris0977,
    • 7 replies
    • 2.6k views

  25. Flow master super 10 and resonator delete. Truck is still quiet

    By 5.3silverado,
    • 3 replies
    • 6.7k views
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