Chevrolet 1994 Astro Passenger Owner's Manual page 178

NOTICE:
Pulling a trailer improperly can damage your vehicle and result
in costly repairs not covered by your warranty. To pull a trailer
correctly, follow the advice in this section, and see your GM
dealer for important information about towing a trailer with
your vehicle.
Every vehicle is ready for some trailer towing. If it was built with trailering
options, as many are, it's ready for heavier trailers. But trailering is different
than just driving your vehicle by itself. Trailering means changes in
handling, durability, and fuel economy. Successful, safe trailering takes
correct equipment, and it has to be used properly.
That's the reason for this section. In it are many time-tested, important
trailering tips and safety rules. Many of these are important for your safety
and that of your passengers. So please read this section carefully before you
pull a trailer.
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
police.
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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 k m 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.
You should use "D" (Drive) when towing a trailer. Operating your
vehicle in "D" (Drive) when towing a trailer will minimize heat
buildup and extend the life of your transmission.
Three important considerations have to do with weight: