2004 chevrolet express 2500
Need some help again. Van has 180k miles, cranks and starts but after around 1 minute it stalls and turns into a crank no start, let it sit for 5 minutes and starts again, can repeat that all day cold engine or warm after many starts. When it starts I leave it on idle and it just dies. Owner already changed crank position sensor, spark plugs, coils, spark plug wires. I erased dtc's and the ones that came back was p0335 crank position sensor again, p0622 generator f-terminal circuit, p1637 generator L-terminal circuit, and u1041 loss of electronic brake control module communication. I haven't had time to get into any testing yet, going to start tomorrow with getting wire diagrams. Thank you for any suggestions.
Well you have some type of wiring and or computer problem. Any sensor that shorts out or computer circuit or wiring the shorts out will do that. Good luck Trace and that down, especially on a GM. I would start by checking all the grounds because the bad ground anywhere can also do that
Thank you so much for answering back. Love your channel and your work.
going to start tomorrow with getting wire diagrams.
gmupfitter.com has free wiring diagrams for your van.
The earliest they have is 2006, but I think it should 95% similar to yours.
Thank you for that tip.
