You cannot reprogram it. A dealer can get you the Master Code if you've lost it.
Yes, locksmiths can also help you replace missing or lost keys, reprogram your car keys and remotes and more.
I lost my remote but had a spare from anoter gm remote I paid for
Lost Minds - 2007 was released on: USA: 2007
your key fob can only be programed by the local gm dealer.
Lost Dolls - 2007 was released on: USA: 10 February 2007
Lost and Found - 2007 was released on: USA: 28 September 2007 (Whistler)
Lost Missing Pieces - 2007 was released on: USA: 6 November 2007
A Family Lost - 2007 TV was released on: USA: 11 March 2007
The Lost Colony - 2007 was released on: USA: November 2007 (Cucalorus Film Festival)
Orangutan Island - 2007 Lost was released on: USA: 16 November 2007
The Lost Tribes - 2007 is rated/received certificates of: Australia:PG