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My 2008 duramax's fast idle is making me scratch my head..

It won't turn on when the truck is cold started. It only turns on when the truck has been running for a bit. What gives? I do the proper procedure to engage it, but it wont work unless the truck has been running for a bit.

1 set the cruise on
2 press E brake
3 use the accalerate to turn on fast idle.

right procedure? It works, but only when the truck is running.
 

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Hi sorry to be late but that is the way it work the best to worm-up your truck in cold condition is to enable the elevated idle

;)
 

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Holly freaking 5 year old thread batman!!!
 

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Ok ok ! I take a chance to continu the poste cause it is rare to poste talking about the hight idel .

bye all ;)
 
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