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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. Performance upgrades for towing 2018 6.2 1 2

    By dco111,
    • 19 replies
    • 13.2k views

  2. Stock Exhaust Diameter? 1 2

    By Bill791,
    • 17 replies
    • 40.4k views

  3. OEM 5.3 muffler size?

    By badfnz,
    • 6 replies
    • 101.1k views

  4. How to remove zerks? 1 2

    By MRSUIT,
    • 15 replies
    • 1.6k views

  5. Hard Downshifts - Is This Normal?

    By jerkyboy,
    • 6 replies
    • 815 views

  6. upgrading CAI 1 2

    By flyingfool,
    • 15 replies
    • 4.8k views

  7. Idle adjustment 5.3

    By bulldog77,
    • 5 replies
    • 25.1k views

  8. Rattle in 5.3 engine at cold start up

    By bulldog77,
    • 4 replies
    • 1.2k views

  9. Why Won’t Corsa Do This Blows My Mind 1 2

    By Omarios,
    • 16 replies
    • 1.7k views

  10. 2017 Transmission Issues 1 2

    By RyGuyFD,
    • 18 replies
    • 30.6k views

  11. 8 Speed hard 1-2 shift & Shudder TSB fix

    By Havasubum,
    • 12 replies
    • 24.4k views

  12. Straight pipe with 3rd catalytic converter delete. LOSS IN MPG 1 2

    By Thuggins,   
    • 15 replies
    • 34.7k views

  13. Gibson Patriot 4" exhaust

    By str8dum,
    • 4 replies
    • 697 views

  14. Flapper

    By Ty Howry,
    • 4 replies
    • 852 views

  15. 2014 Silverado braking jolt

    By Scotty32,   
    • 10 replies
    • 1.8k views

  16. Thoughts on catch can after tune? 1 2

    By g2full,
    • 17 replies
    • 3.1k views

  17. Stock 2014 6.2 V8 exhaust

    By Ty Howry,
    • 9 replies
    • 1k views

  18. L86 Manifold Swap- Catch Can Hose

    By Bohanan23,
    • 13 replies
    • 1.8k views

  19. How do I make my truck the loudest/sound the best 1 2

    By FloridaMac,
    • 21 replies
    • 9.3k views

  20. Single X-Pipe vs Double X-Pipe Exhaust

    By VdellaV,
    • 0 replies
    • 15.5k views

  21. Carven Progressive Series Dump Exit Sound Clip

    By nominion,
    • 2 replies
    • 2.4k views

  22. Letter From Chevy

    By acinquegrana,
    • 9 replies
    • 4.6k views

  23. transfer case rebuild

    By Bill Gutman,
    • 3 replies
    • 2.5k views

  24. parking brake adjustment

    By Digger 1958,
    • 3 replies
    • 22.9k views

  25. Rough Idle, Misfire, Help Diagnosing Codes

    By FishinDVM,
    • 6 replies
    • 13.7k views
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