Abstract: A latch assembly, for holding the doors of trucks and other vehicles in the open position, includes the pivotal latch bar of the prior art but with an improved keeper. The improved keeper has a spring activated lock flap that has one end disposed into the opening formed in the keeper whereby the spring urges the lock flap to its position for closing the opening which receives the latch bar. In addition the latch bar is improved whereby its length can be adjusted to a fixed length in the field.