GMC 2004 Savana - Manual (Page 326)

Secondary Latch System
Your vehicle has an underbody mounted tire hoist
assembly equipped with a secondary latch system. It’s
designed to stop the spare tire from suddenly falling
off your vehicle if the cable holding the spare tire
is damaged. For the secondary latch to work, the tire
must be stowed with the valve stem pointing down.
See “Storing the Spare Tire and Tools” later in
this section for instructions on storing the spare tire
correctly.
{ CAUTION:
Before beginning this procedure read all the
instructions. Failure to read and follow the
instructions could damage the hoist assembly
and you and others could get hurt. Read and
follow the instructions listed below.
To release the spare tire from the secondary latch, do
the following:
{ CAUTION:
Someone standing too close during the
procedure could be injured by the jack. If the
spare tire does not slide off the jack
completely, make sure no one is behind you or
on either side of you as you pull the jack out
from the spare.
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