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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. Engine swap 1 2

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  2. Tow/haul Not Working 1 2 3

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  3. 6.0 to 4.3 swap

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  4. Metal in rear end.

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  5. 2007 2500 hd TCM location 1 2

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