This started out as a possible fuel filter or cat problem, but I found this code, noe I think different.

I was got a no start for about 30 minutes, then eventually I got it to idle.
Before that I had stalling at progressively lower speeds.

 

I had to look this one up...
wow...ECU/PCM fault. Suggest checking all the electrical connectors at the ECU/PCM for any corrosion on any of the terminals or if mice have gotten to any of the wiring.

Keep us informed if you find anything.
Good luck.

 

I made it home and let the truck sit a couple hours and went back out. Didn't start. Checked my fuel rail and had little pressure. Currently replacing fuel pump.
when it's up again I'll erase my codes and see what comes back. I'll check in then.

 

Just got word my fuel pump us in, and currently no codes. Will keep updating as I get more data.

 

Hope you are having a Delco fuel pump installed and not a cheap one....or you will be doing it over again.

I was driving on a highway, 65mph when I lost power. Coasted to the shoulder and I could get the engine to start, but if I tried to go above an idle...it would stall-out. This was when I got to replace the fuel pump in mine.

 

Carquest pump. I dont plan on keeping this another lifetime. Lots of rust in the tank.

Remaking codes
P0420 twice
P0440
P0442
P0446
P0605
P1441
P1870
U1026
U1041
U1042
U1192
U1193

Runs pretty ok considering everything.