GMC 2001 Envoy - Manual (Page 303)

5-29
Follow this diagram for the rear - mounted spare.
A. Wheel Carrier
B. Spare or Flat Tire
C. Wheel Nut and Locking Nut Cylinder
Reinstall the locking wheel nut using the wheel wrench.
Then push the lock case onto the lug nut until it stops.
The key does not have to be inserted into the lock. Push
the lock case to be sure it is secured. The special lug nut
and lock case is not intended to be used on any road
wheel, only on the spare wheel carrier. Tighten the nuts
on the wheel carrier to 22 to 32 lb
- ft (30 to 40 N·m).
CAUTION:
Make sure the tire and carrier are secure.
Driving with the tire or carrier unlatched
could injure pedestrians or damage the vehicle.