2008 Sky Redline - Manual - Emerald Metallic
The only isolated brake and turn signals (i have found) are on the BCM. Believe I addressed that and the connections in the PDF.Thanks. I have 90% of my new setup done. The Sat Receiver idea for ground is great. Given that the trunk tub is plastic, I think the ground path actually is from the Xm receiver harness, through the receiver's chassis ground, on to the bracket that bolts down to the stud. Given that I'm only using it for low current (and that XM is unavailable in BRazil) I think it is enough.
I'll probably write a guide of sorts (not like your professional ones!) on a topic on the Solstice Forum when I nail the remaining 10% which is isolate the brake lights from the turn signal function.