There is a deadbolt on that lock that is lockable from the inside only. It's the top lever, above the latch handle. The other lock that works with the key is the lever under the latch handle.
We've got the same lock on our '96.
Originally Posted by JBBeaubeaux
Old age is coming at a really bad time!
1996 34' Excella 1000, interior totally redone, 2003 Dodge/Cummins HO, Diablo tuner, 115 gallon aux fuel, Bedslide, Airsafe/Reese Dual Cam, and a bunch of other stuff