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Re: 08 gm c5500 durmax idle shut down disable?
Posted to HD/Fleet Forum on 11/7/2017 1 Reply

Is this what you are talking about?

High Idle Speed Enable and Disable

To enable or disable the high idle system perform the following procedure:

 1. Turn the ignition ON, with the engine OFF.  2. Depress the accelerator pedal to the floor an... Login to read more.

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