Chevrolet 2004 Classic Owner's Manual page 275

CAUTION:
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Raising your vehicle with the jack improperly
positioned can damage the vehicle and even
make the vehicle fall. To help avoid personal
injury and vehicle damage, be sure to fit the
jack lift head into the proper location before
raising the vehicle.
5. Raise the vehicle by turning the wrench clockwise.
Raise the vehicle far enough off the ground so there
is enough room for the compact spare tire to fit.
6. Remove all of the wheel nuts.
7. Then take off the flat tire.
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