Mystery with my 2006 GMC Serria

[Martin in the desert]

Regards,

So my truck is a no start, I have a feul gage reading empty, with a known quantity of gas at about half a tank. I have a feul pressure gage installed and have 55 lbs. of fuel pressure. The truck turns over and starts only to die in a second or two.

The scan tool Starts automatically but will not connect? 

Any ideas where to look, I feel it must be getting spark as it fires then dies.

I'm stumped!

Thanks

Martin

[CamGTP]

Crank, runs and dies within 2 seconds says to me that is a security issue.

 

If you have a spare key, try using that. Even attempt a security relearn.

 

The non working fuel gauge in the cluster could be related or may not be at all. Clusters are known to fail in those trucks.

[rjgti]

scan tool not connecting is most likey broken data lines at the back of the obd!! port. if it starts the scan tool that tells me your obd!! pwr and gnd wires are good.  that leaves the data lines