Oldsmobile 2004 Silhouette Owner's Manual page 102

If your vehicle has the power sliding door(s), you can
override the security lock by pressing either power door
lock switch while the power sliding door override
switch(es) is turned off. If the power sliding door override
switch(es) is turned on, the power sliding door(s)
cannot be opened from the inside while the sliding door
security lock is in use.
If you want to open the sliding door while the security
lock is on, unlock and open the door from the outside.
You should let adults and older children know how
the security lock works, and how to cancel the lock.
If you don't, adults or older children who ride in the rear
won't be able to open the sliding door from the inside
while the security lock feature is in use.
2-16
Canceling the Sliding Door
Security Lock
1. Unlock the sliding door and open the door from
the outside.
2. Push the security lock lever all the way down.
3. Close the door.
4. Repeat Steps 1 through 3 for the other door.
The sliding door lock will now work normally.