GMC 2001 Envoy - Manual (Page 295)

5-21
4. The locking wheel nut
can be removed by
snapping the rubber
weather cover off the
face of the lock case.
5. Insert the key and pull
the lock case straight
off. It is not necessary to
turn the key.
6. Put the spare tire near the flat tire.
The tools you’ll be using include the jack (A) and wheel
wrench (B). Your vehicle may also have an optional hub
cap removal tool.