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Engines & Drivetrain

Tech for the 5.3L (L83), 6.2L (L86), and 4.3L V6. Tuning and 6L80 / 8L90 transmission support.


2,730 topics in this forum

  1. Boosted GEN V's 1 2 3 4

    • 53 replies
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  2. Rear main seal. 1 2

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  3. burning oil 2014 1 2 3 4

    • 54 replies
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  4. Borla ATAK

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  5. Ignition upgrades

    • 8 replies
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  6. Top speed Sierra 5.3?

    • 10 replies
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    • 11 replies
    • 1.7k views
  7. Long Tube Header Install 1 2 3 4

    • 48 replies
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    • 3 replies
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    • 3.1k views
  8. serious question on tune 1 2 3

    • 35 replies
    • 6.3k views
    • 2 replies
    • 1.2k views
  9. 5.3 Engine on GM 1 2 3

    • 41 replies
    • 6k views
  10. Anyone?

    • 4 replies
    • 1.4k views
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