Due to an internal issue with my PCM in my truck, I need to replace it. Problem is, the paint is all gone and there is no sticker on top showing the part number. My mechanic pulled the number 09374044 with is SnapOn scanner but that brings up nothing when either him or I do searches for the correct part. So the question is, where can I look for a part number? I haven't tried pulling it to see if there are any factory markings on the bottom side of it yet. Is this a call GM and see if they can tell my buy giving them my VIN?