I have a 07 GMC SIERRA new body style and am having issues with the tire monitor system. I replaced the sensors about a year ago and had a tire fixed and rotated them and now I’m showing just dots will not show pressure on any of them. They worked before this so not sure why a rotation would change things. I do cross rotate and have because that’s what my dad advised to me back in the day. If anyone can help I would appreciate the help. I’m thinking something in the exam or another what I call a brain but not sure