High idle.

[blackLTZ]

Took truck (l5p)to dealer and asked it they could program my high idle and they told me there’s no cal avalible for it yet ??

Fun fact: truck was low on coolant and they said it’s cause I took a long trip and coolant level will go down after a long trip, I was like never heard of that but noted

 

[hammer7896]

Try this
https://www.gmupfitter.com/files/media/photo/795/UI Bulletin_82b.pdf


Mike

 

[jlawles2]

Good luck on getting the dealer to program it for you. i tried 3 times even had the bulletin and they did not want to do it.

On the low coolant, there is a tech bulletin on the L5P where they system needs to be filled and re bled due to an issue during MFG.