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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. 5.3 to 6.2 intake swap 1 2 3 4 5

    By JoeTrahnier,
    • 64 replies
    • 56.2k views

  2. 2018 rear bumper chevy

    By ChevyC101964,
    • 1 reply
    • 813 views

  3. DOD Delete and New Jersey OBD2 Inspections 1 2

    By TigerTruck,
    • 16 replies
    • 6.5k views

  4. 2015 Suburban grill shutters

    By Maw7989,
    • 8 replies
    • 1.6k views

  5. Stock Exhaust diameter

    By sammo84,
    • 3 replies
    • 1k views

  6. 5.3 to 6.2 OEM Exhaust Swap

    By Bohanan23,
    • 12 replies
    • 14.1k views

  7. Radiator fan problems

    By ELo2017,
    • 3 replies
    • 2.8k views

  8. Odd “issues” after MAF sensor cleaning

    By Txbluelacy,
    • 2 replies
    • 2.3k views

  9. Replacing stock fuel pump with LT4 pump

    By Smoke-Town,
    • 1 reply
    • 1.7k views

  10. What Diff 2019 1500 LD RPO G80 with 3.43 gears?

    By JOEYODR,
    • 5 replies
    • 2.7k views

  11. GMC

    By DeeJay2014,
    • 1 reply
    • 823 views

  12. 2014 Silverado

    By Dennis Russell,
    • 0 replies
    • 752 views

  13. 2015 6l80 to 2018 6l80 swap

    By Arturo Alva,
    • 3 replies
    • 2.3k views

  14. Long tube headers

    By Jeff England,
    • 5 replies
    • 1.4k views

  15. LT header? 1 2

    By saltgod,
    • 28 replies
    • 13.5k views

  16. Front Differential Swap

    By Justheman80,
    • 5 replies
    • 4.1k views

  17. L86 8-rib conversion (ATI Damper)

    By Superado1618,
    • 0 replies
    • 812 views

  18. 2014 4.3L Ignition timing is -8 to -13 degrees at idle.

    By Mark Duke,
    • 8 replies
    • 7.7k views

  19. 8l90E Guru question.

    By gonzoid,
    • 0 replies
    • 776 views

  20. Reuse rear ubolts?

    By Snowcamo,
    • 6 replies
    • 1.2k views

  21. Rear end bearings fail

    By ace ventura,
    • 2 replies
    • 888 views

  22. 2017 Silverado 1500 5.3L AFM issues.

    By Geist auto service,   
    • 5 replies
    • 36k views

  23. Big Cam, Big Gains

    By SeekAndDestroy,
    • 3 replies
    • 2.9k views

  24. 8L90 Torque Converter Upgrade

    By Foary,
    • 2 replies
    • 13.3k views

  25. 2014 Sierra 1500 - Front diff leak

    By Neil G,
    • 8 replies
    • 2.8k views

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