[Western Pete]

I installed heated mirrors on my G8 a few years ago... the wiring is not present, at least not on a 2009.5.

I bought some bulk terminals to add 2 pins to each side, connected the GND to a screw close by. The +12V I used a 12V from the center console with a relay to turn on with the rear defrost. The circuit I tapped is for the cig-lighter, it's fused for 40A (or maybe 30A), the mirrors are fused for 10A on the PPV.

Terminals can be found here: https://www.digikey.com/en/products/detail/jst-sales-america-inc/SSF-21T-P1-4/773781

Works great!

 

[Western Pete]

Western Pete and others , did you swap just glass or complete mirror assemblies ?
Is the PPV or SS mirror similar or the same?

I swapped the whole mirror assemblies - but kept my white "caps" as the black PPV ones were very scratched up.

Mounting points are the same for all mirrors G8, PPV, SS.

G8 and 2011-2013 PPV mirrors have a 6-pin connector.
2014+ PPV and SS has a different connector with more pins, to accommodate puddle lights, blind-spot indication, etc.

2011-2013 PPV mirrors are outwardly the same as the G8 mirrors, I'm using the G8 caps on the PPV mirrors. The heated PPV mirrors were an option on the PPV detective trim only, not very common.

It should be possible to wire up 2014+ mirrors to work on an older car - but no new features as BCM/ECU support isn't there of course.

 

[Western Pete]

Here's information on the two connector types:
Door Mirror Connector Information - New Caprice - Discussion forums

There's a thread on the same forum that has the pinout for the heated mirrors also, to figure out what to add where (couldn't find it today)