I've got a 96 LS 400 with 78,000 miles. Had it for about a year. Car is not driven often. After it sits in garage for a week or more brakes squeal when backing out. After driving the noise goes away. Have never had similar problem with any other car American or import. Also are pad replacement the same as earlier models such as 93 or 94? Live in the Houston area. Could high humidity be the problem?