3rd row seating issues

I have a 2006 Suburban LZT. The clamp on the rear of the passenger side 3rd row seat won’t disengage all the rest have. This has become a safety issue. I’ve tried forcing, it does,t work can anyone help

Check for foreign objects that may be obstructing proper operation.

And it may have been inserted incorrectly the last time it was moved. Or it may need lubrication. I’m not sure if you can lube it in place, but when you free it, you could certainly do it then. Get a good flashlight or corded light and give it a good inspection to see if anything looks amiss. Look at the ones that work for comparison. Let us know what you find.