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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

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  1. Mag Na Flow

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  2. Gibson

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  3. Allison Trouble

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  4. 4 wheel drive question

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  5. 4X4tx , you there?

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  6. GM Suit Certificate

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  7. Anybody lift a 2500HD yet?

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  8. After market stuff

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  9. Dual Battery System?

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  10. What is the one thing

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  11. HD Steering

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  12. Snow plow question

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  13. Draw-tite step bars

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  14. Rear 4x6s

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  15. Any tips?

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  16. New member, new pics

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  17. Tach Installation

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