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Check engine light after long trips

6.0boy

By 6.0boy
September 29, 2015 in 2000-2014 Silverado HD & Sierra HD

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6.0boy

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6.0boy

Posted September 29, 2015

Posted September 29, 2015

I drive a 2004 Chevy 2500hd with a 6.0 vortec. After a long trip of 30+ miles the check engine light comes on. It will go away the next day after 10 minutes of driving it. The only mods I have are exhaust and intake. Any ideas on what is causing the engine light

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newdude

Posted September 29, 2015

Posted September 29, 2015

What codes do you have?

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sahls01gmc

Posted September 29, 2015

Posted September 29, 2015

Man, I knew the 1st one to respond was going to say that!

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txab

Posted September 29, 2015

Posted September 29, 2015

I'll guess it's P0300.......

6.0boy

New Member

6.0boy

Posted September 30, 2015

Author

Posted September 30, 2015

I haven't put a code reader to it, because it goes away before I can read it

waumo1

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waumo1

Posted October 1, 2015

Posted October 1, 2015

I haven't put a code reader to it, because it goes away before I can read it

The code should be stored so you can read it.

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