2008 GMC Envoy Owner's Manual - Page 388

7. Turn the wrench clockwise to raise the jack until it lifts the end fitting. 8. Continue raising the jack until the spare tire stops moving upward and is held firmly in place. The secondary latch has released and the spare tire is balancing on the jack. 9. Lower the jack by turning the wheel wrench counterclockwise. Keep lowering the jack until the spare tire slides off the jack or is hanging by the cable. 10. Disconnect the jack handle from the jack and carefully remove the jack. Use one hand to push against the spare while firmly pulling the jack out from under the spare tire with the other hand. 11. If the spare tire is hanging from the cable, insert the socket end of the extension into the hoist shaft hole on a 45 degree angle downward. 12. Be sure that the socket end of the extension connects to the hoist shaft. 5-94