I have a 2002 Cadillac DHS with about 165,000 miles on it. It is making a knocking noise but it is hard to tell where it is coming from. I tried to add video but wouldn’t let me even after I edited it. Just want to get help before I take it to the shop so I want get screwed. If anyone wants to help leave email and I will send video. I’m new to the forum. Thanks!