Buick PARKAVENUE 1994 Manual page 206

When your vehicle is being towed, have the ignition
key off.
The steering wheel should be clamped in
a
straight-ahead
position, with a clamping device designed for towing service.
Do not use the vehicle's steering column lock for this. The
transaxle should be in Neutral and the parking brake released.
Don't have your vehicle towed on the front wheels,
unless you must. If the vehicle must be towed on the
front wheels, don't go more than 55 mph (88 km/h)
or
farther than 500 miles (800 km)
or your transaxle will
be damaged. If these limits must be exceeded, then the
front wheels have to be supported on a dolly.