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idle rpm spec for a 08 k2500

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Old May 2, 2018 | 11:07 AM
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Default idle rpm spec for a 08 k2500

what is the idle rpm spec for a 08 chev k 2500 with a 6.0 6 speed auto. trans?
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Old May 2, 2018 | 04:00 PM
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How specific do you want to get here?

The spec varies a lot depending on in gear or park and what coolant temp it started at and what length of run time it has done.

It can start off as high as 1,100 if the temp is really cold or can be as low as 600rpm in park when warm.

To put it this way it's: In gear on top and park/neutral on the bottom.

The coolant temp ranges from -40 to 306 degrees with the operating temp of 190 degrees being 550/600rpm.

800 800 800 800 780 750 705 665 625 585 550 550 550 625 725 725 725
800 800 800 800 780 750 705 665 625 600 600 600 600 625 725 725 725


There is a different idle rpm table that is specific for start up and will scale it way downward and basically anything over 90 degree coolant temp always starts at 800rpm.
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