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I had to replace both Driver and Passenger side mirrors. I purchased TRQ Model # MRA04786 Replacement mirrors. I hav SLT with memory, reverse tilt, heated, fold in mirrors.
I installed them, no problem. Folding works, I can adjust manually where ever no issues. The problem is they will not go to the memory setting after they have been adjusted. When I put it in reverse they tilt down as they should but will not go back the the driver memory setting. If I manually adjust them to a random spot and hit the driver memory button (or) hit the unlock button on the FOB they will not return to memory setting location.
 

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If you only did a mechanical replacement that should have had no effect of the programmable functions.

george
 

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2020 GMC Terrain 2021 Acadia Denali Ultimate 2016 Corvette Stingray
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It probably needs to be programmed to the BCM by a dealer. Seems hardly anything electrical can just be replaced/added and expected to work properly.

-Dan
 
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