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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. Upper and lower oil pans, HUH???

    By mikeyk101,
    • 2 replies
    • 23.4k views

  2. Check your catch can hoses

    By UrbanRage,
    • 0 replies
    • 1.3k views

  3. KNOCK MORE THAN A TICK sound !

    By SV DADIDOC,
    • 3 replies
    • 1.4k views

  4. 6l80e issues

    By Carl e,
    • 2 replies
    • 1.7k views

  5. P0430 after Lifters replaced

    By DCazares,
    • 13 replies
    • 5.4k views

  6. Drone pipes

    By jcotews,
    • 10 replies
    • 1.4k views

  7. 2014 4.3l engine rebuild no pistons 1 2

    By Nick75scottsdale,
    • 19 replies
    • 5.7k views

  8. Post your Gear Ratio / Tire Size MPG 1 2

    By chris.lee718,
    • 17 replies
    • 2.6k views

  9. calculated fuel economy

    By AZ_SS,
    • 2 replies
    • 809 views

  10. Transmission Cooler Line Failure

    By Outdoor 74,
    • 5 replies
    • 2.3k views

  11. 2500 rear springs in a 1500

    By z71taz64,
    • 2 replies
    • 966 views

  12. Can you "flip the pill" on a 2014 4.3 Silverado? 1 2 3

    By Jayselectricco,
    • 35 replies
    • 8.4k views

  13. Intake clean. WOW! 1 2 3 4 18

    By bdbake01,
    • 258 replies
    • 158.8k views

  14. Transmission oil cooler line assembly 2014 sierra

    By dzsmith,
    • 4 replies
    • 1.7k views

  15. Programing opinions? Engine and trans 1 2

    By Snowcamo,
    • 15 replies
    • 3k views

  16. DOD/AFM Delete kits

    By BumpStop97,
    • 4 replies
    • 2.8k views

  17. Which Axle 9.75 or 9.5 1 2 3

    By Antoine08,
    • 42 replies
    • 58.3k views

  18. Stock Exhaust Back Pressure??? 1 2 3

    By BuyAmericanIron,
    • 43 replies
    • 22.6k views

  19. collapsed lifter with rocker arm still moving?

    By tig488,
    • 3 replies
    • 4.3k views

  20. 3.08 to 4.56 Gear swap issues? - 6.2 Tahoe 2018

    By Cort Liggins,
    • 1 reply
    • 1.2k views

  21. What should I do to solve the issues of the 2014 Sierra?

    By Bradmodsierra,
    • 8 replies
    • 1.6k views

  22. 6l80E reset after fluid/filter change?

    By Outlaww,
    • 4 replies
    • 7.6k views

  23. Ticking Sound Increasing with RPM - Lifter Problem?

    By Western96,
    • 6 replies
    • 5.5k views

  24. Thermostat problem? 1 2

    By Lspoo19,
    • 21 replies
    • 29.3k views

  25. 2018 Silverado WT Transmission Cooler Lines

    By BowTi3Guy,
    • 3 replies
    • 1.1k views
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