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My 2008 Chevy Impala makes a rumble sound or vibration when going from 6-cylinder mode to 3-cylinder mode, with or without slight acceleration.

It sounds fine when it goes back into 6-cylinder mode. I am concerned. Any suggestions?

  • Welcome to the site. I've made edits to the question to make the question more clear. Please feel free to make modifications if something has been lost in the editing. – Zaid Mar 24 '18 at 17:22
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    Hows the oil level and when was the last time it was changed? – Ben Mar 25 '18 at 1:14
  • Oil Just done less than 1000 miles ago – Kimberly Mar 25 '18 at 20:48
  • And level is full – Kimberly Mar 25 '18 at 20:51
  • When was the last time it was fully serviced (tuned-up)? Is the Check Engine Light on? Any codes? – CharlieRB Mar 25 '18 at 22:21

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