I’ve an 03 160k I fixed dashboard and changed fluids until yesterday it quit in the driveway so I’m looking at scan tools I replaced fuel filter only once so maybe it’s the CP3 or pressure switch
I moved this into its own thread in the LB7 section so it'll be seen better. When you get a scan tool, please post the codes you find and any other mods you've done to your truck. It'll help the guys out. Welcome and good luck.