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Old 01-20-2011, 09:04 PM   #1
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Question 2007 SS Imapala

The tachometer in my 2007 Impala SS stopped working today. I also noticed that its not switching from 8 to 4 cylinder modes like it should. Well actually it doesn't shift to 4 cylinder at all. When driving down the highway at about 60 I am only getting 7 miles to the gallon. Does anyone have any experience with this, or any input at all? It is greatly appreciated
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Old 01-27-2011, 03:50 PM   #2
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I would recommend taking the vehicle into your local GM dealership to be diagnosed. They should be able to assist you further and have a plan for addressing the issue. If you have any other concerns, please feel free to private message me. Thank you.

Caron, GM Customer Service



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The tachometer in my 2007 Impala SS stopped working today. I also noticed that its not switching from 8 to 4 cylinder modes like it should. Well actually it doesn't shift to 4 cylinder at all. When driving down the highway at about 60 I am only getting 7 miles to the gallon. Does anyone have any experience with this, or any input at all? It is greatly appreciated
Thanx
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Old 01-27-2011, 04:28 PM   #3
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Never really had that situation here or discussed. You need to have the PCM read and see what error/fault code is showing. The free one at Auto Zone should show something.
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