2007-2008 Acadia
2007-2008 Envoy
2007-2008 Sierra
2007-2008 Sonoma
2007-2008 Yukon
2007-2008 Yukon XL

Can I program a duplicate ChipKey myself?
Yes, consult your Owners Manual for any restrictions.
The programming procedure is in the Keys section.

If all ChipKeys are lost can I program a new ChipKey myself?
No, Find a Locksmith in your area they can help.