hey folks. So I recently had my oil changed at a local Cadillac dealership (Cadillac of norwood,ma) they said they topped off all fluids as well. my check coolant light has been coming on, I did check my coolant resivoir and it is about an inch below the fill line. I know the car requires DEX COOL. however today I went to add the DEX COOL pre mixed 50/50 coolant and I noticed that the fluid in my resivor looks almost pinkish. I am apprehensive to add the coolant I purchased because I know the DEX COOL is supposed to be orange. Do you believe the dealership would use any fluid other then the recommended DEX COOL?