Open rear doors to 170 degrees?

On 2008 LTZ ext cab....is there a latch that allows the rear doors to open 170 degrees? Doors seem to stop at approximately 90 degrees.
 
 

no latch that im aware of. just keep pushin' ......maybe ltz is diffrent from lt, idk.

Is this truck an extended cad or a crew/club cab?

The way the doors are set up you can open them to 90 degrees and then if you push more it should open up to 170 degrees.

Ext cab.  I've been afraid to just "push" past the 90 degrees but I'll give it a try tomorrow during daylight.
 
Thanks!

Sure enough, I was being too timid about pushing beyond the 90 degrees!

i cant beleave the sales man didnt show it to you