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2000-2014 Silverado HD & Sierra HD

The workhorses. Discussion for the 2500HD and 3500HD heavy-duty trucks. Covers the 2014 HD transition year.

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  1. Duramax Diesel & 8.1L Big Block

    The torque monsters. Tech for the LB7, LLY, LBZ, LMM, LML Duramax engines and the 8.1L Vortec (L18). Covers the Allison 1000 transmission.

    1.8k
    posts

14,431 topics in this forum

  1. Changing mirrors?

    By Smrobs,
    • 2 replies
    • 1.1k views

  2. 2000 Silverado 2500 6.0 hesitation

    By VinceWeiss,   
    • 2 replies
    • 8.3k views

  3. Frustrated...04-LS6.0

    By FD-Man,
    • 3 replies
    • 1.1k views

  4. Headers

    By Cromy,
    • 3 replies
    • 994 views

  5. Captain seat rear swap

    By SPACEDUNKEY,
    • 2 replies
    • 15.7k views

  6. 2013 Silverado 6.0 Over heating

    By Henry Thoreson,
    • 4 replies
    • 1.6k views

  7. Windshield Washer Fluid Low

    By Tinkerboy,
    • 3 replies
    • 3.2k views

  8. No power trailer light fuses

    By Todd67,
    • 0 replies
    • 1.6k views

  9. cw77

    By cw77,   
    • 1 reply
    • 1k views

  10. 2002 Suburban hard start

    By Rick Cruz,
    • 0 replies
    • 866 views

  11. 07 Classic LBZ Performance Chip?

    By Cburge95,   
    • 3 replies
    • 1.9k views

  12. No Spark, Help, I'm Stumped

    By JHenline,
    • 4 replies
    • 14.7k views

  13. Gmt800 best year

    By vortec1259,
    • 3 replies
    • 3.5k views

  14. Cab differences 99-06

    By 96Formula6spd,
    • 7 replies
    • 17.2k views

  15. satelite radio conversion

    By Rick789,
    • 1 reply
    • 1.1k views

  16. tahoe no oil pressure

    By Thomas Neels,
    • 1 reply
    • 917 views

  17. Rich Conditions

    By Joe Muckle,
    • 2 replies
    • 666 views

  18. 2012 2500HD 6.0 won't start

    By Greg Donaathan,   
    • 2 replies
    • 2.3k views

  19. Downshifts to low at highway speeds

    By Robert Rick,   
    • 4 replies
    • 3.1k views

  20. 2012 And Newer 6.0L Oil Filters

    By C/K Man,
    • 9 replies
    • 29.8k views

  21. lower rad hose replacement 2006 8.1 litre gas engine

    By stormin norman 60,
    • 2 replies
    • 1.2k views

  22. My ac vents stay on defrost on my 2003 GMC Sierra 2500hd 6.0L

    By ElJohnnyBoy,   
    • 1 reply
    • 2.9k views

  23. 2002 Chevy Silverado 2500Hd Allison Tranny Issue

    By GP84,
    • 2 replies
    • 3.6k views

  24. 2007 check engine light and transmission problems

    By swlone,
    • 2 replies
    • 931 views

  25. Electrical Problems

    By Dan F,
    • 2 replies
    • 882 views
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