GMC 2005 Savana Van Owner's Manual page 318

1. Check under the vehicle to see if the cable end is
visible.
If the cable is not visible, start this procedure at
Step 6.
2. Turn the wrench counterclockwise until
approximately 6 inches (15 cm) of cable is exposed.
5-80
3. Connect the jack handle (C) and jack handle
extension (B) together and press the retention
clip (arrow) so it engages.
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. The
set-up should look like the picture above.