I have a 2005 gmc sierra 1500 4.3 v6. I get no kind of codes just going down the road and it die or start it up in the morning and it would just shut off.
I've changed the icm , the cps , plugs, wires, distributor cap and button. I've clean the throttle body. changed the serpentine belt and had the alternator tested. I've checked fuses. had the fuel pressure tested and its good. I'm at my wits end.