I got my 2002 Suburban mirror in today as well. Its a Gentex-177 model, paid 60 with shipping of ebay. I got the idea from Kitchen and his build.
(you PA guys might notice the shirt)
Heat shrinked the 7 wires
Now I have to figure out the wiring to get the temp and compass functional
From the left: black w/white stripe, green w/white stripe, pink, grey, green, black and another pink
Edit: I think I found what I needed for the wiring,
Here is the low down on the connections to a Gentex mirror (with comp and temp) cut from a late model GM product. The connector pin numbers are found on the wire incursion side of the mating connector.
GM wire harness color function
PIN 1 PINK POWER +12 volts
PIN 2 BK CHASSIS, GND
PIN 3 LT GRN BACKUP LIGHTS
PIN 4 GY TO AUTO DIM OUTSIDE MIRROR
PIN 5 PINK TO AUTO DIM OUTSIDE MIRROR
PIN 6 DR GRN/WT TEMP PROBE
PIN 7 BK/WT TEMP PROBE
Note: Pin 3 is to be connected to the backup lights to turn off the auto dim feature in reverse. If you intend not to use this feature connect the LT GRN wire to chassis ground. If this pin is floating the auto dim will not work properly. Hope this helps. Walt