Is it my ECU?

[paradoxbomb]

Follow up: It turned out to be a short. The truck dumped me at a 7-11. Turn the key and absolutely nothing would happen. My mechanic was happy to get it "nice and broken" (his words), and fixed the short in about 20 minutes. All the gauges are now working properly and consistently, and the truck starts faster when cold too.

Thanks for all the advice!

[4D55 Performance]

Follow up: It turned out to be a short. The truck dumped me at a 7-11. Turn the key and absolutely nothing would happen. My mechanic was happy to get it "nice and broken" (his words), and fixed the short in about 20 minutes. All the gauges are now working properly and consistently, and the truck starts faster when cold too.

Thanks for all the advice!

I know Mike knows more than me, but every once in a while I get lucky. I don't want to say I told you so, but I can't resist. "I told you it was a loose connection"