You sure it doesn't have a timer built in? You might even get lucky with theater dimming!
you know, I never even thought of that. I did a very quick just wire-into-the-harness-end mock up just to check the lighting and they stayed on so I knew something wasn’t right and decided troubleshooting was fit for another day. I Didn’t know this particular mirror had a timer or delayed dimming option. I will wire it it all up correctly and report back my findings. If I can find a seamless install for this particular mirror I’ll even write up a how-to to share with everyone. I love the use of OEM GM parts to upgrade our cars but I always want to make sure it’s done correctly too. The options this mirror has is very appealing, the only other thing I wish it had built in was a Homelink garage door opener but I have other plans for that feature in the future.