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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. Truck struggling and some form of whining noise

    By cubangt,
    • 13 replies
    • 6.9k views

  2. Sprint booster throttle enhancer for sale $180 shipped

    By pokismoki,
    • 3 replies
    • 773 views

  3. Exhaust Tips

    By bayouguy71,
    • 2 replies
    • 901 views

  4. Best oil for the 5.3 1 2 3 4

    By Crutter,
    • 51 replies
    • 187.1k views

  5. Instead of catch can, why not delete PCV? 1 2 3 4 13

    By SquireSCA,
    • 181 replies
    • 51.5k views

  6. Hp fuel pump terminal connector

    By Brad Young,
    • 0 replies
    • 480 views

  7. 2014 Tahoe dash gone wild...

    By Kevin Andrews,
    • 0 replies
    • 525 views

  8. Talk Me Into Installing This Borla Atak

    By alodawg26,   
    • 13 replies
    • 8.9k views

  9. Torque App, gear selector PID 1 2

    By flyingfool,
    • 17 replies
    • 20.1k views

  10. L83 intake manifold swap 1 2 3

    By romeoortiz92,
    • 31 replies
    • 64.2k views

  11. Muffler delete mod

    By timber74wolf,
    • 0 replies
    • 955 views

  12. 2018 Muffler Delete - Straight Pipe Work? 1 2

    By TwoBallScrewBall,
    • 25 replies
    • 42.6k views

  13. Best 2WD Launch Method

    By WHITESSTOWPIG,
    • 2 replies
    • 1k views

  14. Yes the 6.2 Liter V8 engine consumes oil! The same in the GMC and Cadillac 1 2 3 4

    By Roger lake,   
    • 48 replies
    • 48.3k views
    • LDM
    • LDM

  15. 2015 Silverado Max Trailering Package

    By NicoleTowsNow,
    • 1 reply
    • 963 views

  16. 17’ GMC 6.2 Whipple Supercharged with Trans Tuning?

    By Tanner Smith,
    • 2 replies
    • 2.7k views

  17. 17' GMC 6.2 Whipple Supercharged Fuel Upgrades Needed to run E85?

    By Tanner Smith,
    • 9 replies
    • 8.7k views

  18. Clunking Sound ? and slight vibration !

    By Borntorun,
    • 4 replies
    • 2.5k views

  19. injectors

    By mmontanasam,
    • 1 reply
    • 588 views

  20. 26” wheels with V6 drivetrain

    By DJ Morpheus,   
    • 4 replies
    • 5k views

  21. 4.3 Questions and Tuner option for power

    By My18Silverado,
    • 9 replies
    • 12.5k views

  22. Mobil 1 Delvac ATF for 6L80?

    By FishNJ,
    • 3 replies
    • 8.4k views

  23. 17' Sierra Whipple Supercharger Smaller Pulley?

    By Tanner Smith,
    • 6 replies
    • 6.5k views

  24. 2016 silverado 5.3 v8 1 2

    By Ltz4 me?,
    • 19 replies
    • 3.6k views

  25. Advice on 2014 silverado 4*4, crew cab, 5.3L

    By jwm2201,
    • 3 replies
    • 1.1k views

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