Chevrolet 1993 Astro Passenger Owner's Manual page 203

Parking on Hills
You really should not park your vehicle, with a trailer attached, on a hill. If
something goes wrong, your rig could start to move. People can be injured,
and both your vehicle and the trailer can be damaged.
But i f you ever have to park your rig on a hill, here's how to do it:
1. Apply your regular brakes, but don't shift into P (Park) yet.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, release the regular brakes until the
chocks absorb the load.
4. Reapply the regular brakes. Then apply your parking brake, and shift to
P (Park).
5. Release the regular brakes.
When You Are Ready to Leave After Parking on
a Hill
1. Apply your regular brakes and hold the pedal down while you:
Start your engine.
Shift into a gear; and
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you're pulling a trailer. See
the Maintenance Schedule for more
on this. Things that are especially
important in trailer operation are automatic transmission fluid (don't overfill),
engine oil, axle lubricant, belt, cooling system, and brake adjustment. Each of
these is covered in this manual, and the Index will help you find them
quickly. If you're trailering, it's a good idea to review these sections before
you start your trip.
Check periodically to see that all hitch nuts and bolts are tight.
mailer Light Wiring
See "Trailer Wiring Harness" in the Index.
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