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Duramax LMM High Idle

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Published on Jan 10, 2012

2008 Duramax LMM Elevated Idle-to put you truck into elevated idle, turn key to on, depress/hold gas pedal to the floor and hit the brake 3 times, elevated idle off will come up repeat the elevated idle on will come up.
Once elevated idle is turned on it will stay on and only activate when the truck is cold and temperature is below 32 degrees

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