GMC 2007 Envoy - Manual (Page 470)

2. Using the wheel
wrench, loosen all
the wheel nuts.
Do not remove
them yet.
3. Turn the jack adjusting knob clockwise by
hand to raise the jack lift head.
4. Place the handle, extension, and wheel
wrench onto the jack.
A. Front Frame/Rear Axle
B. Jack
C. Handle
D. Extension
E. Wheel Wrench
5. Place the jack in the appropriate position
nearest the flat tire.
Front Position Rear Position
470