I took it to GM Friday. I'm very happy with everything so far. The sensor was bad. They said they had to replace the coolant tank. Total charge for that was $170. While I was there, I got my oil changed and also had them flush the transmission fluid (it was due).
Out the door total was $525.
Maybe tomorrow I'll spend the day washing my car. That's due too.
'08 "Cool" Silver Solstice GXP
Debadged (Pontiac arrows on sides & front remain)
Trifecta 'Budget' Tune, DDM Backbone (Race), DDM Probeam. Short Antenna, Front Mud Flaps, Black Kappa Rack