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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.

2,740 topics in this forum

  1. Dual exhaust

    By DTOMKIDD,
    • 0 replies
    • 853 views

  2. Which Engine Oil? 1 2 3 4 5

    By SirBunnyEater,
    • 63 replies
    • 22.9k views

  3. What Makes The Z60 Suspension So Stiff?

    By Eddie 70,
    • 5 replies
    • 12.4k views

  4. Would tuning solve my trans issues on my 6speed

    By BlackHawkZ71,
    • 3 replies
    • 1.1k views

  5. Axle ratio swap? 1 2

    By Driver72,
    • 16 replies
    • 2.1k views

  6. Borla Atak vs Corsa Sport 1 2

    By Thats a nice truck,
    • 25 replies
    • 10.2k views

  7. need help on muffler choice 1 2 3

    By BlackHawkZ71,
    • 30 replies
    • 5.8k views

  8. Just installed my exhaust

    By Kevin King,
    • 6 replies
    • 1.2k views

  9. Does anyone else have a spin happy stock truck 2016 model 1 2 3

    By BlackHawkZ71,
    • 35 replies
    • 4.8k views

  10. 14" Magnaflow Part #

    By turnerms98,
    • 2 replies
    • 1.1k views

  11. First fluid changes on the new K2's?? 1 2 3 4

    By LongrangeLauber,
    • 53 replies
    • 7k views

  12. BlackBear Tune - For Those That Have It ..

    By GMC-AT,
    • 7 replies
    • 1.7k views

  13. 2016 Silverado 5.3 CHEAP Exhaust Route

    By Chevrojayy97,
    • 9 replies
    • 5.9k views

  14. Shoot, accidentally put regular in tuned 6.2 1 2 3

    By truckguy82,
    • 33 replies
    • 6.4k views

  15. Blackbear, Diablew, or other Tuned - using 91+ or 87/89 tune? 1 2

    By Haus_Z71,
    • 20 replies
    • 15.2k views

  16. 2016 ENGINE

    By cow10r,
    • 6 replies
    • 1.9k views

  17. Wanted input with those who went with a 5.3 over a 6.2L. 1 2 3 4 5

    By ericxog,
    • 71 replies
    • 12.9k views

  18. Muffler change? 1 2

    By Driver72,
    • 21 replies
    • 2.6k views

  19. 2014+ Quietest performance exhaust.. Help please.

    By mattpest,
    • 6 replies
    • 1.2k views

  20. First Oil Change

    By dorkweed,
    • 14 replies
    • 1.7k views

  21. Do I have this right? 1 2

    By paradizecityz,
    • 21 replies
    • 3.3k views

  22. Another flippin' flapper question

    By BSME1115,
    • 5 replies
    • 1.3k views

  23. Single In/Out Borla for 2014 Silverado High Country 4WD with 5.3L? 1 2

    By TedH,
    • 16 replies
    • 2.9k views

  24. Noise coming from transfer case but only when accelerating?

    By gone_fishing,
    • 3 replies
    • 11.7k views

  25. Who has a Gibson cat back installed on their 6.2? Need some install p

    By pewterliftedz,
    • 1 reply
    • 687 views
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