Chrysler PT Cruiser Owner's Manual page 348

346 STARTING AND OPERATING
The following chart provides the industry standard for
the maximum trailer weight a given trailer hitch class can
tow and should be used to assist you in selecting the
correct trailer hitch for your intended towing condition.
Refer to the Trailer Towing Weights (Maximum Trailer
Weight Ratings) chart for the Max. GTW towable for your
given drivetrain.
TRAILER HITCH CLASSIFICATION
Class
Class I - Light Duty
Class II - Medium Duty
All trailer hitches should be professionally installed on
your vehicle.
Max. GTW
(Gross Trailer Wt.)
2,000 lbs (907 kg)
3,500 lbs (1 587 kg)