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GM V8 AFM Lifter 12645725 Upgrade

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March 26, 2026
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Video Description:
In this technical demonstration, we explore the GM V8 AFM Lifter 12645725 upgrade process. Watch as we break down the specialized spring mechanism, examine the friction-reducing steel roller design, and explain how this updated component functions within GM's Active Fuel Management system. Learn proper installation techniques and maintenance considerations for optimal performance in 5.3L and 6.2L V8 engines.
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