GMC 2005 Safari Owner's Manual page 282

Notice: If you remove or restow a tire from/to the
storage position under the vehicle when it is
supported by a jack, you could damage the tire
and/or your vehicle. Always remove or restow a tire
when the vehicle is on the ground.
Your compact spare tire is stored underneath the
rear of your vehicle. You will use the ratchet
and extension to lower the compact spare tire.
5-74
4. Attach the ratchet to the extension, with the DOWN
side facing you. The extension has a socket end
and a flat chisel end.
The ratchet has
an UP side.
It also has a DOWN side.