I was using blackberry earlier and hard to type so here is the full details
Chevy 2001 G2500 Cargo Van, 5L (Express)
-Engine will not start when ignition Key turned and fuel pump doesn't prime. When the pump primes the engine starts. Also note either way it does turn over.When it did start it seemed like it was missing or something and I had to rev the engine to keep it going.
-Gas Gauge past full(when fault is present)
-Speedometer did not work or waved around
-Red lights Park, reverse and Neutral lights not lighting up although D,1,2,3 will light up when I move the gear lever over. note :when I remove the C2 Red connector from the PCM ALL lights work fine.
-At the fuel pump assembly every thing tests out ok and I am thinking about putting it back in the tank.
Pump works when given 12V, Ground good, relay works fine and the resister attached to the float works fine when the fault goes as it is intermittent. I now have the float assembly out of the tank so when the fault goes I can move the float and the gas gauge does slowly rise although when I move the float to the full position the gauge will only read 3/4 full.
-when fault shows the OBD will not connect
-When the fault is not there the OBD will connect but there no data because I think I pulled the battery and cleared.
-There is also something strange on ground 451, PIN 1 on the PCM red connector, Pin 5 on the Data link connector. It is a ground and grounding but seems like there is a mili voltage there.
Mike, I am an electrician by trade so I am good with the basics but don't have extensive knowledge of auto electrical
Original fault codes
Gm codes :P0608, P0650, P1504. Generic code: P0650
I originally thought the cluster was done, but it and the connectors seem ok. It seems like something is groundig out somewhere, maybe a sensor or something.
I was starting to look at the speed sensor but don't no where it is could it have grounded out.