Another fuel economy inspired issue is the automated fuel management system in my Silverado. Whenever possible the engine drops from six cylinders to four. It's supposed to be a seamless transition from 6 to 4 and back to 6 cylinders. I get a sluggishness when transitioning back and after 5 trips to the dealer they said it was normal and I had to live with it. I'm almost used to it after 5 years.
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