Hey there, just wanted to say hello to everyone and introduce myself. I just bought a 2001 Silverado Ext. cab short box 2wd 4.8 Liter. This is my first 2wd truck ever, I have owned a few 4x4 and several Suburbans. So the problem I have is the tow/haul mode does not seem to engage. Is there a solenoid or something that may have went bad, or something else. (No light comes on, on the dash, and the trans shifts the same).