GMC 2001 Envoy - Manual (Page 296)

5-22
Position the chisel end of your wheel wrench, or the hub
cap removal tool (if equipped), in the notch of the hub
cap and pry off the hub cap.
Some of the molded plastic hub caps have imitation
wheel nuts molded into them. The wheel wrench won’t
fit these imitation nuts, so don’t try to remove them
with the socket end of the wheel wrench.
If you have individual wheel nut caps that cover each
nut, they must be removed in order to get to the wheel
nuts. Use the socket end of the wheel wrench to remove
the wheel nut caps.
Your wheel nut caps may attach your hub cap to
the wheel. Remove these wheel nut caps before you
take off the hub cap.