In regards to this post: http://www.dieselplace.com/forum/showthread.php?t=231646&highlight=brake+valve

Has anyone done the manual valve? What one did you use? Are you happy with it? Any suggestions?

I called my dealer and the part referenced in the article is $265. But, gmpartsdirect dot com has it for $135 plus shipping.

I have herd some say the new part did not help. But for $135 I think it would be worth the investment.