Hello all I had my water outlet replaced on my 2011 1.4 LTZ auto 2 weeks ago from GM dealer. Now I noticed on my ultra gauge its ruling hot meaning going up a hill then stopping and park, let it idle the temp goes up to 230 fan comes on slow then climbs to 245 and fan is on ultra high and takes 5 min to start to come down. Never did this before always fan on at 230 and then drops to 212 fan went off. No trouble codes at all. Antifreeze is full no leaks at all, looked all over. Over flow tank drops and rises like normal when hot and cold. Please help figures just out of warranty 2 months ago.