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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. Rear Differential 2015 Silverado Z71 Binding

    By 2015SSilverado,   
    • 4 replies
    • 3k views

  2. Driveline Shudder/Vibe 1 2

    By Spurshot,
    • 24 replies
    • 3.3k views

  3. Fuel Injector Special Warranty

    By magnusdog,
    • 8 replies
    • 35.2k views

  4. What transmission is compatible

    By bluehatch 87,   
    • 4 replies
    • 6k views

  5. Oil Pump and Lifter Issues, or something else causing this?

    By KevinRum,
    • 10 replies
    • 13.4k views

  6. Has anyone swapped a LM7 or similar gen in k2xx

    By Exposing FACTZ,
    • 3 replies
    • 965 views

  7. 4 Auto and 4 Hi vibrations after 4" BDS Lift

    By 6.2Creedmoor,
    • 9 replies
    • 6.2k views

  8. Possible Transmission/Torque Converter Failure

    By m980,
    • 10 replies
    • 2.9k views

  9. Recommendation for RCSB cat back on lowered truck? 1 2

    By BigTopGT,
    • 20 replies
    • 2.7k views

  10. Fuel Cell Installed In Truck Bed

    By Darth_Vader,
    • 8 replies
    • 9.8k views

  11. Transmission Temps High When Towing

    By papageoff,
    • 9 replies
    • 1.8k views

  12. Possible torque converter failure?

    By Calvin Novak,
    • 7 replies
    • 2.2k views

  13. Cat delete on 2018 5.3 silverado

    By king_castro_91,
    • 5 replies
    • 8.1k views

  14. Looking at picking up my first GM truck (2018 silverado 1500), looking for things to watch for

    By tube,
    • 2 replies
    • 1k views

  15. Brand new (maybe not new after all) TBV 70⁰ strange temps. 1 2 3

    By mikeyk101,
    • 30 replies
    • 4.6k views

  16. Wiring Harness

    By Ronaldo Ortega,
    • 3 replies
    • 855 views

  17. Are these Genuine GM Oxygen Sensors?

    By Big_Eight,
    • 3 replies
    • 1.7k views

  18. 15 Silverado Front and Rear diff fluid

    By Kyle77,
    • 4 replies
    • 1.4k views

  19. 4wheel High Binding?

    By jsumner83,
    • 2 replies
    • 1.6k views

  20. Gauging interest in complete 8 rib conversion for ecotec3 l86 l83 engi 1 2 3

    By Denali62,
    • 38 replies
    • 11.9k views

  21. RCSB 2wd Driveshafts

    By TwoPlyLife,
    • 5 replies
    • 1.2k views

  22. Strong fuel smell in cab and from engine

    By Steveinsc,   
    • 10 replies
    • 12.3k views

  23. Average MPH

    By TheRiver,
    • 0 replies
    • 562 views

  24. ATF/DOD programmers…

    By Chris krum,
    • 1 reply
    • 1k views

  25. Fuel tank problems on my 2015 Chevy 3500 HD Cab Chassis 6.0

    By Doc61,
    • 0 replies
    • 372 views
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