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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. 2018 L83 DoD Delete = Running great, then no Compression

    By Kubs,
    • 7 replies
    • 4.8k views

  2. Cam kit parts, is this all I Need? BTR stage 2.

    By Alex Olsen,
    • 6 replies
    • 12.5k views

  3. Carven Competitor vs MBRP Single Exit

    By midnightsilvy,
    • 0 replies
    • 322 views

  4. Johnson Lifters, CAM, and Push Rods

    By Eneerge,
    • 2 replies
    • 689 views

  5. 2016 Silverado 6L80e filter seal puller

    By SCR71822,
    • 7 replies
    • 10.4k views

  6. Carven Catback?

    By midnightsilvy,
    • 0 replies
    • 263 views

  7. Shops that will do an AFM delete in or around Colorado? 1 2

    By TQUAP,
    • 16 replies
    • 2.7k views

  8. Trans flush or drain/refill + filter

    By TQUAP,
    • 5 replies
    • 890 views

  9. Fluid capacities and type

    By TQUAP,
    • 1 reply
    • 640 views

  10. Whipple LT4 pump

    By Buddy B,
    • 4 replies
    • 498 views

  11. 2018 8L90 Delayed shifting

    By Travis Crawford,
    • 1 reply
    • 679 views

  12. Whipple supercharger

    By Buddy B,
    • 4 replies
    • 655 views

  13. Letter from GM on 2014 and up Sierra Vacuum pump failures 1 2

    By Ed S,   
    • 23 replies
    • 23.4k views

  14. AFM delete kit

    By dna9656,
    • 3 replies
    • 992 views

  15. Is converting to manual possible?

    By Joanna,
    • 14 replies
    • 12.9k views

  16. Mechanical DOD delete without the ECM DOD delete

    By joneich,
    • 5 replies
    • 1.4k views

  17. Vacuum leak?

    By Buddy B,
    • 1 reply
    • 560 views

  18. 2018 silverado humming/whistle on hard acceleration

    By jonny8126,
    • 0 replies
    • 380 views

  19. Vacuum leak brake booster

    By Buddy B,
    • 1 reply
    • 532 views

  20. 2015 Silverado 1500 Screech Sound

    By 2004crewcab,
    • 2 replies
    • 784 views

  21. Dealership, Amsoil or Mobil 1 Oil change

    By UrbanRage,
    • 4 replies
    • 1.3k views

  22. 6L80 What to do?

    By nomadw8,
    • 11 replies
    • 3.3k views

  23. Thinking of changing oil weight to 5W30 after GM's recent recall 1 2

    By rav3,
    • 18 replies
    • 5.2k views

  24. 2015 1500 5.3 6L80 Swap to 8L90 1 2

    By MrRosado,
    • 21 replies
    • 56.1k views

  25. Need longer o2 harness for turbo L83

    By NcTong01,
    • 1 reply
    • 583 views
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