Check the cable bundle to the brake switch on the pedal.
On my car the cables were made too short,tearing the cables apart when pressing the brake pedal.
I think there is a thread with pictures in this forum about this.
Good Luck!
---------- Post added at 09:59 AM ---------- Previous post was at 09:44 AM ----------
http://www.tahoeyukonforum.com/forum/showthread.php?t=35641&highlight=brake+switch
On my car the cables were made too short,tearing the cables apart when pressing the brake pedal.
I think there is a thread with pictures in this forum about this.
Good Luck!
---------- Post added at 09:59 AM ---------- Previous post was at 09:44 AM ----------
http://www.tahoeyukonforum.com/forum/showthread.php?t=35641&highlight=brake+switch