Chevrolet 2008 Express Owner's Manual page 341

4. Attach the jack handle/jack handle extension to the
jack. With the UP mark facing you, slide the ratchet
onto the end of the jack handle extension.
5. Place the jack under the vehicle, ahead of the rear
bumper. Position the center lift point of the jack
under the center of the spare tire and turn the
handle clockwise to raise the jack until it lifts the
secondary latch spring.
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