Reverse Lights?
 

Previous owner replaced the tail lights. Did these trucks come with reverse lights?

Yes they did. I just rewired a 01 recently. Took the box off, put a deck on. What do you want to know about that wiring system?

Just pulld the tail light assembly. Sorry for the stupid question. Maybe both rev bulbs are burned out.

It's possible, but let me tell you what I found on this last truck. There is a sensor in the Auto tranny for reverse lights to come on. It also sends a neutral and park position signal to prevent starting in gear. This truck had a failed sensor. Power went from the fuse, to the switch, but no power out of the switch to the back up lights. Something to look into. Manual transmissions have a similar switch as well.

Im gonna second the backup light switch!

I have to hold the gear shifter on mine for the back up lamps come on.

check the fuse, everytime i pull my buddy's trailer it blows the fuse and i lose my reverse lights. Not saying it couldnt be the switch but check the fuse first.