Yes, the trouble seems to be that OnStar won't quit trying to be helpful.
Every connection is soldered and covered with heat shrink. I've been using a 3:1 shrink ratio tubing that has heat-activated glue in it. I like it.
I wired this in with the integration harness that came with the GMOS-LAN-03 integration module. That harness connects the integration module to the factory radio harness and the aftermarket radio, and has a connector for the ASWC-1 pre-wired.
I took the advice and pulled the OnStar fuse, and that made the process work just like the instructions. I reset the module, got the fast flash, held volume-up until it stopped. I got 7 green flashes (first one long, then 6 short). I then got 2 red flashes (for Kenwood radio, which is correct). It went solid red for several seconds, then green. The instructions say that it's recognized the car and the radio, and that it should work.
No dice. I tried it several times.
I'm suspicious of the GMOS-LAN-03 harness that came with the integration module. The SWC-1 instructions say that pins 2 (white/green wire) and 4 (green/orange) on the module should be grounded for our cars, and the steering wheel control from the car's harness is on pin 3 (yellow/green). The GMOS-LAN-03 harness only has wires on pins 2 and 3, and they don't 100% match the wire colors for the SWC-1. There is a white/green wire on pin 2, but pin 3 is green/orange and there's nothing on pin 4.
I think I need to call Axxess. I suspect either the harness is wrong, or (more likely) there's yet another thing I need to do that's not documented.
2006 Solstice, Mysterious 5-speed