Jeep Speedometer Calibrators

I purchased this for my 2005 Jeep Grand Cherokee and the website said it would fit. When I got it I was getting error messages and was told I would be contacted in a few days. It was about a week before I heard anything and tried some trouble shooting but kept getting the error. I contacted the manufacture and after about 2 hours on the phone with them and them talking to some technicians we were told that the part doesn't work on my model of jeep. The tech said that if it was any other year/model then there would not be an issue. This only affects the '05 jeep grand cherokee 4.7. This model is black listed for some reason. I really wanted this to work. I don't blame CARiD for selling a part that doesn't fit because the manufacture listed it as working on their website too. CARiD was great with working with me on getting a refund. Just a warning for any other jeeps wanting to get this.