Keyless Entry Remote Key Fob - 4 Button (Gas Door)

could not program to my 1999 Cadillac deville, after spending money on checking the car reciever,it still wouldnt work, by the time I got the car checked out, was past return time, bought a OEM gm fob and that one works.

If they had made it easier to find out if this would work with my car before I bought it, I might not feel so much like I got swindled.