Sorry guys, but I didn't take pictures while I was removing the stock bumper.
I do remember the process and if you have any questions just ask.
First you have to remove the lower grille portion from the bumper. The best ways to do it is use a flat screwdriver and gently remove the grille from front and rear at the same time going from the side to the center.
Then remove plugs from fog lights and turn signals.
Now you have to remove the bolts and clips from the inner fender which attaches to the bumper.
After you done this raise the truck and remove all bolts holding the bumper under the truck.
As soon as you will do this, pull the bumper out. It should go easily.
The next step is to unscrew the bolt which holds the reinforcement bar and remove the bar itself.
Last thing you have to do is to remove side brackets which were holding wings of the stock bumper. Note: do not remove the headlight bolt.
Here you can see the truck with stock bumper removed.