parking brake wont stay off

So after using my parking brake yesterday and now the parking brake wont stay completely in I push it in and the light turns off then I start driving and half a mile the light is on and lever is out a couple inches out. Any one know a fix for this. Sorry of Grammer and stuff I'm on my phone.

 

The return spring is under the truck, under the driver seat area. Might just need lubed, that and the cable itself. Or in my case I added a secondary spring to the linkage underneath as the original just didn't have what it took anymore.

 

The bell cranks on the drums are prone to seizing too. (where the cable meets the rear brakes)
Easy to check, look under the rear of the truck and see if they move when someone pulls the ebrake.