Bruce Nunnally Posted November 30, 2009 Report Share Posted November 30, 2009 All 2010 GMC V-8 powered Sierra pickups now feature variable valve timing, a technology that enables continuous control of valve opening and closing that results in better engine breathing, fewer emissions and improved fuel economy. View the full article Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
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