obs Tahoe rear bumper

[wilcfr]

Could somebody tell me how many bolts are used to mount the rear bumpers on the obs Tahoe? I have removed the four surrounding the step/license and the four on the two braces, but nothing is moving. I'm guessing I have missed some, but I have looked and don't see any. I have read as many as 12 and would to know if true where are they hidden. I removed the front bumper in a half an hour and have been working on the rear for three days. Thanks in advance.

 

[wilcfr]

For the record there are 8. Two on each side of the step and two holding the braces on the edges. The issue turned out to be years of rust. A few well applied whacks with a small sledgehammer took care of the problem. The new bumper is on. Onto the next part of the project.