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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.

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14,430 topics in this forum

  1. 03 silverado 4X4

    • 8 replies
    • 721 views
  2. Mystery drive sound

    • 4 replies
    • 602 views
  3. Rear Wheel Seal

    • 6 replies
    • 833 views
    • 0 replies
    • 1.5k views
  4. 6.0 Liter Rod Knock

    • 3 replies
    • 9.3k views
    • 2 replies
    • 528 views
    • 7 replies
    • 4.6k views
    • 2 replies
    • 591 views
  5. No overdrive

    • 5 replies
    • 24.4k views
  6. Alignment issues

    • 0 replies
    • 1.2k views
  7. radiator leak

    • 3 replies
    • 462 views
    • 1 reply
    • 885 views
  8. Computer Module?

    • 3 replies
    • 736 views
  9. I'm at a loss

    • 4 replies
    • 1.8k views
    • 1 reply
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    • 0 replies
    • 348 views
  10. Tire's

    • 1 reply
    • 629 views
  11. Evap issues

    • 0 replies
    • 1k views
    • 15 replies
    • 22.1k views
  12. Po306 misfire

    • 0 replies
    • 504 views
  13. Ummm, what is this??

    • 2 replies
    • 669 views
    • 1 reply
    • 811 views
    • 1 reply
    • 3k views
  14. Adding OEM power items

    • 2 replies
    • 1.1k views
    • 2 replies
    • 8.7k views
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