Same thing happened to my 13, May be the same with yours. I had a key fob for accessing my shop security door next to my ignition key for probably 6 months. Somehow it affected the chip in the key. They replaced the ignition and key under warranty. Have you tried your other key?
This just happened to my 15 today. Won't come back on at all. Have to see what dealer says. This truck has spent more time at the dealer than my last 6 trucks combined. Ridiculous.
Ha! Typical. "Perfectly normal". The clamps have definitely got rid of the clunk. I find now if I brake really hard I will get the clunk. May have to try the clamps on the other side of the springs.
Give it a shot. Did this on the weekend and took away all the clunking I had going on. Initially thought it was the tranny, had the update done for the 8 speed. The update made it worse if anything. Installed the shackle brackets on the springs like pic posted and it's gone for now.
Has anyone installed the Rancho quick lift shocks? Looks to be a decent alternative. I don't want to loose any ride quality with a spacer levelling kit after bouncing down the road in 3/4 tons.