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2019-2025 Silverado & Sierra Engine & Transmission (L3B/L82/L84/L87/LM2/LZ0)

Technical Discussion, help, and advice for the Chevy Silverado and GMC Sierra small block engines,6/8/10 speed transmissions, along with factory and performance exhausts.
 L3B 2.7L Turbo, L82/L84 5.3L & L87 6.2L, and LZ0/LM2 3.0L Duramax Diesel Engines. 

970 topics in this forum

  1. 2.7L 4Cyl in the 2020 Sierra 1500

    By Markus Warwick,
    • 3 replies
    • 1.4k views

  3. Any good extended warranties?

    By Mike Borowski,
    • 4 replies
    • 1.7k views

  4. Outside diameter of tailpipe on 2.7L Silverado

    By 64BAwagon,
    • 3 replies
    • 4k views

  5. 2023 silverado Transfer case fluid

    By JCA,
    • 7 replies
    • 1.7k views

  6. 19 Silverado DFM DELETE HELP

    By Chris383cc,
    • 0 replies
    • 892 views

  7. Why are 6.2L catbacks almost all 2.5" pipes and 5.3L almost all 3" pipes?

    By Jackseric,
    • 2 replies
    • 2.7k views

  8. 2020 3L check engine light P3196 1 2 3

    By ian cloutier,
    • 31 replies
    • 30.6k views

  9. Catch can LM2 3.0 Duramax

    By Billy Ogle,
    • 4 replies
    • 5.1k views

  10. 13.48 at 103 on the draggy 1 2

    By SILVER SLED,
    • 24 replies
    • 3.1k views

  11. Muffler Advice

    By Cody G,   
    • 8 replies
    • 3.7k views

  12. Fuel Injector Failed 2022 1500 Refresh Elevation 5.3 with DFM... 2.9K Miles and 2 months old.

    By mjkane1,
    • 2 replies
    • 1.3k views

  13. 3.0 Duramax - Regens, mileage, and the computer. Do I have a problem here?

    By redvettez06,
    • 14 replies
    • 14.8k views

  14. Pulsar LT to deactivate DFM and prevent lifter fail?

    By brewtus,
    • 9 replies
    • 6.3k views

  15. Lifters went.

    By Joshfire72,
    • 2 replies
    • 2.3k views

  16. Wiring a light bar to the battery

    By LAAC,
    • 2 replies
    • 707 views

  17. 9.5” rear axle pinion spline diameter

    By DHBWA,
    • 0 replies
    • 378 views

  18. 3.0 Duramax with max towing package impact on fuel economy

    By Paul Beaudet,
    • 2 replies
    • 5.1k views

  19. Looking for advice on misfire codes while truck at dealer

    By JoJo1,
    • 5 replies
    • 1.2k views

  20. 3.0 Duramax 10 Speed Trans

    By Jaketab,
    • 2 replies
    • 2k views

  21. Rear pinion leak - Peened nut

    By DHBWA,
    • 2 replies
    • 913 views

  22. Has anyone else had these shifting problems? 2020 5.3 10 speed

    By mwlewis558,
    • 6 replies
    • 2.1k views

  23. 2019 Silverado 5.3 valve question

    By Randy Oreilly,
    • 3 replies
    • 1.9k views

  24. 6sp automatic 19 Silverado

    By Randy Oreilly,
    • 2 replies
    • 872 views

  25. 2019 5.3L Water Pump Replace or Inspect?

    By lerbud,
    • 1 reply
    • 1.1k views

  26. HELP! 2020 Chevy Silverado 5.3 how to remove serpentine belt? 1 2 3

    By Emmanuel Torres,
    • 34 replies
    • 100.9k views


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