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2011 GMC Savana 6.6L Duramax, has codes P0191, P0088 what is wrong?

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2011 GMC Savana 6.6L Duramax, has codes P0191, P0088 what is wrong?

Vehicle: 2011 GMC Savana 6.6L Duramax

1 Answer

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P0191 GMC - Fuel Rail Pressure Sensor Circuit Range/Performance
Read more: https://www.autocodes.com/p0191_gmc.html

P0088 GMC - Fuel Rail/System Pressure Too High
Read more: https://www.autocodes.com/p0088_gmc.html

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