CEL on, then off - codes U0100, U0073, and P0700
Twice in the last two weeks I've had my check engine light come on, and then go off again after a few driving cycles - the first time, right after I brought it into the shop, which sent me on my way with a "come in again if it comes on again" wave.
The codes it's throwing are U0100, U0073, and P0700. There are a few threads sprinkled around the internet for a similar code group for Silverados and Tahoes. The most frequent suggestion is that there's a burnt-out buss bar fuse, and the most frequent response is "the fuse is fine, dangit."
I'm not sure if a burnt fuse's the case here, since the light goes out.
But before I take it in for more serious service, has anyone else seen these codes in this grouping? What was your solution?