Vmans

I know the post is several years old, but I just recently had this happen in my 2015 Silverado Z71. I was standing beside my truck, it was off and the keys were in my pocket, as I was on the phone with my local dealership the truck suddenly locked and then remotely started by itself. The tech on the phone said he'd never heard of anything like that happening and suggested bringing it in so they could attempt to diagnose it, they'd first look at the wiring harness and go from there. But as someone else had done, I removed the battery from my fob and it immediately stopped. Thankfully I do have two fobs and I've been using the 2nd fob for a few days now and so far I haven't had the first sign of trouble. Just for curiosity's sake, I placed the battery back in the 1st fob and as soon as the battery was in the fob my doors started locking and unlocking again. Something is up with that particular fob, I don't think I'll keep my appointment at the dealership if it's only the fob. I can get one off Amazon and allegedly I can program it myself. We'll see, I found the programming info here, https://www.siddillon.com/service/service-tips-tricks/how-to-program-chevy-key-fob/#:~:text=On your Chevy key fob,in the “On” position.