I Am going to be going to look at a '97 seville sls next week and have a couple of questions. First off is how can I check to see if the coolant system maitnace has been done? I was told by a few people to simply call GM with the vin# and if the service was done at any GM dealer that they would have it on file,is this true? Also are there any trouble spots to look out for in these cars,and where do I look for any oil/fluid leaks on these cars?