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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.

    1.7k
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14,430 topics in this forum

  1. 2003 silverado 2500 loss of gas pedal

    By jj catts,
    • 2 replies
    • 890 views

  2. 2001 c350hd p1220 p1221

    By Lou jr,
    • 0 replies
    • 1k views

  3. Truck stalls at idle.

    By Cody McDonald,
    • 3 replies
    • 2k views

  4. Reverse light help - 2003 GMC 3500 Duramax Dually 4x4 flatbed

    By alabass,
    • 3 replies
    • 2.1k views

  5. Rear end clunking

    By Kruck88,
    • 9 replies
    • 6.9k views

  6. 4WD grinds under load?

    By Zac Bert,
    • 1 reply
    • 1.5k views

  7. New Member 2500 6.0 fuel questions help!

    By Tim Marquardt,
    • 5 replies
    • 1.2k views

  8. Tune needed? 6.0 with 5.3 heads.

    By 05lq4,
    • 11 replies
    • 15.6k views

  9. 09 Suburban 2500 - backup lights don't work but come on with unlock

    By supaphly42,
    • 2 replies
    • 1.1k views

  10. 2002 GMC 2500HD 6.0L 1 2

    By Roberts2500HD,
    • 16 replies
    • 7.3k views

  11. Electrical Gremlins in Gauges and Locks and more!

    By GrumpyYoungMan,   
    • 0 replies
    • 1.3k views

  12. 2009 2500 HD Diesel

    By DieselDude,
    • 1 reply
    • 773 views

  13. 6.0 bogs at full throttle 1 2

    By Rocky Adams,
    • 28 replies
    • 8k views

  14. '07 2500HD Work Truck wiring harness

    By Bluebark,
    • 8 replies
    • 1k views

  15. DL3 Mirror swap...no window function??

    By wazzabi_zx,
    • 3 replies
    • 859 views

  16. 2012 Silverado 2500hd LT integrated trailer brake system

    By Loy Cribbs,
    • 9 replies
    • 5.3k views

  17. Sean

    By Bible thumper,
    • 4 replies
    • 840 views

  18. 2012 Spyder Headlights Installation

    By gator63,
    • 0 replies
    • 817 views

  19. 2000 year 6.0l 2500 dash lights flicker and then tranny won't shift out of 1st gear

    By TruckCanuck,
    • 1 reply
    • 747 views

  20. Rpm change and vibration 2013 GMC 2500HD 6.0l Vortec

    By Nsjenner,
    • 2 replies
    • 3.2k views

  21. 2011-2014 HD Skid Plates

    By C/K Man,
    • 0 replies
    • 1.4k views

  22. 4wd wont dis-engage

    By RowdyRuss,
    • 4 replies
    • 1k views

  23. P2459 Diesel Particulate Filter Regeneration Frequency

    By gator63,
    • 0 replies
    • 1.6k views

  24. Quadrasteer parts

    By Gerry Hewitt,
    • 2 replies
    • 7.8k views

  25. Semi floating rear axle

    By Tech Machine-Tool-Repair,   
    • 8 replies
    • 17.2k views

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