If you have a key with a chip sometimes called transponder key or module and/or brought your own key Walmart may not guarantee getting it cut and likely wont guarantee anything beyond the cost of recutting unless they stock the key. So, in that case your best option would be to contact a professional locksmith or dealer and get it cut and programmed.
Keys made at department stores are likely to have a greater tendency of trouble, like not working or requiring unnecessary jiggling to make them work since it was not cut perfectly. If you want a professional to cut your keys you would need to contact a Locksmith or Dealer. If you dont know any locksmiths near you, just visit www.autolocksmithfinder.com and look for a locksmith using your zip code.