What would cause the backup sensors not to work?

[the80proof]

I don't think it's the switch. It seems to be something else.. Any of you guys run into this problem? I'm also wanting to know what is the best way to rmove the cat? Is there a bolt it test pipe or do I have to cut it out and weld a test pipe in??
Thx

[rowcoach]

Can't help with the backup sensors. Mine is almost to sensitive. My trailer hitch sets it off.

There is a cat delete pipe made to direct replace the cat. Search the net. Mine cost less then 100 bucks 5 years sgo. Sorry I don't remember the site. It was pretty easy to swap. No welding just a big hammer to beat the cat off.