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👍 5+ MPG’s MORE! 2006 Sierra 4.8L 7.4 Vortec Mpg Improvement

Last updated: Sunday, December 28, 2025

👍 5+ MPG’s MORE! 2006 Sierra 4.8L 7.4 Vortec Mpg Improvement
👍 5+ MPG’s MORE! 2006 Sierra 4.8L 7.4 Vortec Mpg Improvement

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