Blast zone key i have no clue what this is?
I bought a 2005 Chevy Silverado 3500 HD
and to the Right of the steering wheel
center of the dashboard down midway,
there is a little red thing that says blast
zone with a key in it. If the key is turned to
the left it says regular zone if the key is
turned to the right it says blast zone. I M
so confused by this. Please help! I don't
want to turn the key, I am nervous. Thanks
in advance.