Most of the harness is interchangeable between the cars, most of the time, and with some obvious exceptions.
Some lighting is different between Solstice and Sky, so the headlight/taillight harnesses may differ.
The NA (Base) and RL/GXP have different harnesses.
Some years of the RL/GXP had a vacuum pump that other years do not.
Different options will have different harnesses, for eample: OnStar, power windows/locks, radio levels, etc.
Engine harnesses will be the same for Solstice and Sky, but there was a running change in ECM between 2007 and 2008, at which point both harnesses changed.
There may be other exceptions that I have missed, but someone is likely to speak up.
Sky NA 2007 Midnight Blue
Sky RL 2008 Carbon Flash - Naked
Last edited by JohnWR; 06-26-2019 at 04:55 PM.
Reason: Thanks Robo