How?
Buy this:
BRAND NEW GM PK3 B97PT TRANSPONDER CHIP KEY | eBay
Bring to local key cutting place.
Have them cut it to match your existing key.
They should do it for free, but tell you they can't do anything for you if they **** it up.
Then follow the program sequence.
It MIGHT be in the owners manual, if not, its definitely on this forum somewhere.
Edit: I read the description, the seller provides you with instructions on how to program.
So I'd suggest you buy one or two if you're in need of spare.
Much cheaper than the dealer.
