2000 Breeze (ChipKeys were optional on this model)
2000 Neon    (ChipKeys were optional on this model)
2000 Voyager

Can I program a duplicate ChipKey myself?
Yes, consult you 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