2001 CHEVROLET 3500 4X4 Truck

On sale this weekend. Posted it for 18k 2 weeks ago posting it for 16k this weekend only. TRUCK AND BED ONLY! 01 chevy 3500 4x4. 6inch lift 35x13.50x17. No rust anywhere. 153k miles. Built trans. Full detroit posi locker rear end. Efi live with tunes ran through a edge monitor. Air dog 95. Truck currently has an electrical issue caused from bad connection/ground or battery. Talked to a guy and he said the ECM was being backfed from one of them 3 reason. With that being said the tunes are currently not working and the trans shifts odd at times. When start it jumps rpms but then idles back to 800rpm. Truck still runs and drives though. I am located in effingham Illinois.