yea, I can try it on a buddy's truck and see if it communicates. If not, it goes back to the eBay seller. thanks guys!

Battery is pretty new, we had two weeks of below 10F and the truck never had issues starting. But I’ll check the voltage.

Only thing added on is a box to convert the XM radio to an aux in which I disconnected at the fuse box.

The step I did was

Get in the truck close door parking brake on
Ignition on
Auto lights off
Plug in tuner

I still get unable to read vehicle type (1)

Heyo I just picked up an unlocked, used Predator for my 05 5.3 Silverado. Truck has no mods previously. Getting the unable to read vehicle error, scanner is u1973 on 9r11. My OBD2 reader works fine, I can’t even get a VIN on the predator. Any ideas or should I be returning the tuner to the eBay ...