How do I tell if my 2003 GMC Yukon Denali has econ- boost?

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Natrad in Danville CA

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Feb 15, 2015

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2 Replies

Popular Answer
pushrodon Feb 15, 2015

That's 'Fords' claim to fame, not GM!... Google it.

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Natradon Feb 15, 2015

Okay so I might be using Ford's name for my GM system. My owner's manual says I have something that kicks it from 8 cylinders to 4 on the highway. I want to know how I can verify if my vehicle has it or not.

pushrodon Feb 15, 2015

It used to be called Variable Displacement (4-6-8) on the older Cadallic engines. It is now called Active Fuel Management, introduced in 2007..... I think!!.. You can do some online research OR just call a GM dealer with the vehicle ID number to be sure... Pretty sure your 2003 6.0L does not have this feature!

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Hal Dortonon Feb 16, 2015

It's not a Ford so you don't have it.

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