Kbone

Hello. I've read through more than 50 pages of this post and the comments, Including the last several pages. I have learned a great deal and think I can now form an educated question. It seems that Phil may be here less these days, and I'm not seeing anyone in precisely my situation. Hoping to get some assistance here. I Recently purchased a 2019 Sierra Denali 2500 (old Body style - info below). During the drive home (950 miles Idaho to AZ) I noticed driver side only tow mirror power fold and reverse tilt did not work. I assumed a simple motor fix would be the end of it. Upon investigating I found a mirror with no fold motor! I further assume that it was damaged and replaced with the wrong mirror, for whatever reason. Passenger mirror functions fully. Trying to ascertain if they replaced the harness. I have confirmed that Pins 11, 9, & 41 exist on both sides of the door hinge harness (I do have pics). Pin 3 exists on the body side, but not the door side (puddle lamps wouldn't have been on these mirrors, and I will likely replace with factory mirror - maybe add a puddle light in the future). I'm not 100% positive but think the remaining pins in the door side and mirror attachment sides of the harness are factory and should allow plug and play functionality as long as I get the right mirror. The apparently replaced mirror only contains 9 pins (vs 15 on the apparently factory harness) Can you assist? Not sure that I am looking at the right pinout diagrams online. Also, since detailed information is scarce how the tilt function works (memory function sometimes listed but I don't see any added motor or linkage in diagrams), I am proceeding as if a factory model number replacement will restore powered fold/ unfold and reverse tilt. Looking at purchasing model number 84691681 (replaces 84041609). Assuming I only need a replacement DQS mirror and not a new harness. RPO codes: A45, DP9, DQS 2019 GMC Sierra Denali 2500, 4x4, gas,old body style (2014-18)