1999 DeVille Concours in excellent condition with 133K miles...gaskets blown...never overheated to date...exhaust in the coolant resevoir noticed after having to add one gallon twice in 230 miles...after sat a week now observe white billowing 'smoke' and smell out of both exhausts...the car doesn't have a scratch or ding...never wrecked...shines like the day she was new...driver's seat leather a bit worn and the headlight covers are sandblasted and need replaced, also the gas gauge quit (tank unit) but nothing else until the headgaskets...still doesn't overheat. Owned since new and serviced better than scheduled. I wouldn't complain if it was a 'normal' head gasket job as in $500-$1000 but between $4K and $8K+ dependent on route taken? Unbelievable. The northstar and the Seville STS brought back Cadillac and now leaves me and others stranded and frustrated...Nearly $50K new and 133K miles later essentially junk? What gives???