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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

The AFM active fuel management will not shift from 8 cylenders to 4 on my 2011 Silver

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Old August 22nd, 2017, 11:51 AM
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Default The AFM active fuel management will not shift from 8 cylenders to 4 on my 2011 Silver
2011 Silverado truck
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Old August 22nd, 2017, 2:17 PM
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You might get more responses in the Silverado or Chevy Trucks forum. This is Suburbans and Tahoes.
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Old August 22nd, 2017, 4:38 PM
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Do you have it in Drive and not in 3?
Do you have any check engine lights on?
Do you have a custom tune?
Do you have an AFM disabler installed ?
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