Chevrolet 1993 Astro Passenger Owner's Manual page 198

Your Driving and the Road
If You Do Decide To Pull A Trailer
If you do, here are some important points.
There are many different laws having to do with trailering. Make sure
your rig will be legal, not only where you live but also where you'll be
driving. A good source for this information can be state or provincial
pol ice.
Consider using a sway control if your trailer will weigh 2,000 pounds
(900 kg) or less. You should always use a sway control if your trailer will
weigh more than 2,000 pounds (900 kg). You can ask a hitch dealer
about sway controls.
Don't tow a trailer at all during the first 500 miles (800 km) your new
vehicle is driven. Your engine, axle, or other parts could 'be damaged.
Then, during the first 500 miles (800 km) that you tow a trailer, don't
drive over 50 mph (80 km/h) and don't make starts at full throttle. This
helps your engine and other parts of your vehicle wear in at the heavier
loads.
Three important considerations have to do with weight:
Weight of the Trailer
How heavy can a trailer safely be? It depends on how you plan to use your
rig. For example, speed, altitude, road grades, outside temperature, and how
much your vehicle is used to pull a trailer are all important. And, it can also
depend on any special equipment that you have on your vehicle. You can
ask your dealer for our trailering information or advice,
or you can write us at
the address listed in your Warranty and Owner Assistance Information booklet.
In Canada, write to:
General Motors of Canada Limited,
Customer Assistance Center
1908 Colonel Sam Drive,
Oshawa, Ontario L1H 8P7
4-44