GMC 2003 Savana Owner's Manual page 319

5. Attach the jack handle/jack handle extension to the
jack and slide the ratchet with the UP mark facing
you onto the end of the jack handle extension
so your set-up looks like the picture above.
6. 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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