Wow...is there anyone like you in Phoenix? I just called my dealer to ask about the 100,000 mile tuneup for my 2007 Solstice GXP. He quoted me $350 to replace spark plugs, $130 to flush the coolant, and $170 for the transmission. I believe my water pump actually needs to be replaced, which he quoted a whopping $1,200. Any suggestions as to where I could go beside a dealer? Thanks!