Ideas? No! Lets find the amswer. When you had the entire fuel system changed I am assuming the fuel pump was changed. AHHH HAAA another one! There is a problem with the connectors on these fuel pumps. And there is realy no way to determine if your problem is the connector other than this. The next time the engine stalls jump out, crawl under the truck, and wiggle the fuel pump wireing harness. Then try to start the engine. You could also jump out the fuel pump, wiggle the wires, and see if the pump turns on and off. To jump out the fuel pump--unplug the fuel pump relay--look the relay located just behind the left front wheel well under the hood, and observe the wire diagram on the relay--with a small wire, jump out terminal 85 and 86 only. This will directly run your fuel pump with or without the key in the on position.
The loose connection is caused by a flaw in the design of the chassy fuel pump harness connector. The prongs inside the connector pry open when you unplug the fuel pump connector. This causes the connection to be loose. When you are driving air is flowing all around your suburban. This may be the cause. Vibration also may be it. Anyway, this loose connection will eventualy began to arc--thus melting the connector--and it could cause a fire at your fuel tank. This problem will also NOT send any type of trouble code to the computer. Let me know how you make out Good luck
Wednesday, November 21st, 2007 AT 2:24 AM