I am in the same situation. I have a 2004, and bought some "so-called" replacements on eBay. Turns out, the part numbers HAVE to be GM 10347463 or GM 10347464. No others will work. So I tried the iKeyless.com site that was posted here, and it looked promising until it came in the mail and the part number was the same as the part number from my eBay efforts. GM 10354922. NOT compatible with 2004's. So, I tried calling the number posted, 1-815-675-0707, and it was no longer in service.
SO....does anyone have a source for these fobs? They have been discontinued and are no longer being manufactured. I FIND IT APPALLING THAT CADILLAC AND GM WOULD DISCONTINUE A VITAL PART LIKE THIS. There should be a class action lawsuit.
Anyone have a source for these? Don't tell me eBay. Those are NOT compatible unless they are part number GM 10347463. I found what I thought were some vendors that had them, ordered them online, only to get an email back a day or two later with a refund saying, "these are no longer in stock and discontinued".
What a
Jack