Intake manifold gasket developed a slight antifreeze leak. I noticed it at about 55K, but it was probably there when I bought it. Although a great engine, GM's late model 3.1L is notorious for this.
Also a notorious problem on Grand Prix's, the passenger floor gets wet after it rains.
The car has only had these two problems which is common for all of them. Other than that it's a great car. Fun to drive, reliable, starts like a light switch in even below 0 weather.
Performance and Luxury at the cost of quality granted.
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