GMC 1999 Envoy Owner's Manual page 238

Removing the Spare Tire and Tools
The jacking equipment you'll need is stored along the
driver's side inner rear quarter panel. Your vehicle is
also equipped with work gloves and a plastic ground
mat to assist in the changing of a flat tire.
Your vehicle's spare tire is located underneath the rear
of your vehicle.
5-20
To remove your jack cover,
pull up on the latches on the
cover. Remove the wheel
blocks, jack and
wheel wrench.
NOTICE:
Never remove or restow a tire from/to a stowage
position under the vehicle while the vehicle is
supported by a jack. Always tighten the tire
fully against the underside of the vehicle
when restowing.
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