I have the turn signal mirrors in my 08 LT. The driver side signal stopped working so naturally I changed the bulb. Still did not work. The turn signals in the headlight housing and rear taillight housing still work, just not the one in the mirror. I checked the fuses associated with the DDM and turn signals they were all fine. I also looked into the wiring inside the door panel and in the door jam, everything looks fine. So I’m at a loss as to why the turn signal won’t work. It’s also not an issue with the whole mirror itself as I tried it on the other side and on another trailblazer. If anyone has any suggestions I’m all ears. Thanks for the help!