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Posted

This is my first post and already tried the search function but never got a clear answer for what I am experiencing.

 

i have a 2017 GMC Sierra Denali with the 6.2L. While driving on flat surface/roads or minor overpasses I am experiencing the grade brake function engage and losing power and high RPMs. This does not go away until I shut the vehicle off.

 

any ideas?

 

-Danny

Posted

Is there more of a permanent way to turn it off? I don’t think I should have to do it every time I get in.

 

plus could this be leading towards a failure? I would like to correct it if it a problem.

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