On paper, the Lucerne should have enough ground clearance not to scrape its
frame on commonly encountered dips in the rural areas of this country, but
it does.  In fact, on some curvilinear driveways, the car's frame will
catch the concrete.

The factory does not ordinarily specify the ground clearance but you can
measure it.  Unladen, the lowest point is about 5.5 inches.  Not enough:

Fill the tank, add passengers and baggage and the car will sag because the
springs and tires compress.  Drive at a snail's pace and you might get
through a dip without scraping, but hit it at 15 mph and you will think you
just tore out the underside.  Here's why.  When the front wheels climb out
the dip at any speed, the car is subject to angular acceleration.  The
car's inertia translates this motion into increasing front end weight.  The
springs compress further and the tires flatten out more.  Your 5.5 inches
of ground clearance evaporates.  The chin spoiler and worse, the frame hits
the road with a bang so hard, you'll be lucky the frame doesn't crack & the
air bags don't go off in your face.

Old people have suffered heart attacks from this phenomenum, yet it's
totally avoidable if only GM adds three inches.  Compensate the added
height by adding 4.5 inches to the width and handling and safety is
preserved.  Its that simple.  The car is starting to resemble a '55 Chevy,
isn't it.  Old Harley Earl at least got the ground clearance right.

This is not a rant.  It is good advice to GM 'cause I ain't goin' to buy no
$30,000 Buick that drags and scrapes on every bump in the road.

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