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This happened to me too. The emissions test broke the diaphragm in the gas cap. Bought a new gas cap and it fixed everything.

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Q: Why would the service engine soon light come right after passing an emissions test today on your 1999 gmc Yukon?
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Why won't the check engine light go off on my 98 gmc Yukon?

The light is one because there is a problem with the emissions system. Once the problem is corrected the service tech will reset the light.


Check engine light 2001 yukon xl Comes on intermittently Auto store says it's emissions?

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What does it mean when the service engine soon comes on for your 1999 gmc Yukon?

The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.


What are the causes of the service engine soon light on 2002 gmc Yukon?

The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.


What size engine does the 2015 GMC Yukon have?

The 2015 GMC Yukon has a V8 engine.


What size engine does the 2004 GMC Yukon have?

The 2004 GMC Yukon has a V8 engine.


What size engine does the 2001 GMC Yukon have?

The 2001 GMC Yukon has a V8 engine.


What size engine does the 2008 GMC Yukon have?

The 2008 GMC Yukon has a V8 engine.


What size engine does the 2010 GMC Yukon have?

The 2010 GMC Yukon has a V8 engine.


What size engine does the 2006 GMC Yukon have?

The 2006 GMC Yukon has a V8 engine.


What size engine does the 2005 GMC Yukon have?

The 2005 GMC Yukon has a V8 engine.


What size engine does the 2009 GMC Yukon have?

The 2009 GMC Yukon has a V8 engine.