A Austin New member Joined Dec 24, 2009 Messages 4 Reaction score 0 Points 0 Dec 24, 2009 #1 When i press the tow/haul button in my 99 GMC Sierra, nothing happens- no lights, etc.. 5.3, 4l60E, 1500 SLE Any Ideas??
When i press the tow/haul button in my 99 GMC Sierra, nothing happens- no lights, etc.. 5.3, 4l60E, 1500 SLE Any Ideas??
