I have an 01 Suburban. It wouldn't start and thought my daughter ran it out of fuel as the gauge was well below E. Put 5 gallons in it and it started right up. Shut it off, walked into the house to wash my hands. When I came back out to leave, the gauge was below E again and it wouldn't start. As I was sitting there, the gauge came up, heard the fuel pump come on for a couple seconds and it started right up. Drove to the store and again, when I turned the key on, fuel gauge was dead and no start. after 10-15 seconds, gauge went live and it would start. A few days later and it will not start at all and fuel gauge stays in-op. Disconnected Batt, turned key on/off, reconnected batt...nothing.

A few weeks ago I had the fuel tank off to replace the rear brake lines aft of the ABS pump. I thought maybe I had pinched the wiring, but was skeptical that I had pinched both the gauge AND pump wires to make them both fail in exact unison. Dropped the tank again anyway to check. I am a good electrical troubleshooter. Was an aviation electrician in the Navy and have been an electrical specialists since. So I went over the wiring as I would an aircraft, but found nothing to indicate a break in continuity. For no particular reason, I had my wife turn the key on just before lifting the fuel tank back up and the fuel pump hummed-up, fuel gauge swung up and it started. Ran for a day and then wouldn't start this morning.

So, am I looking at a new engine computer or is there some small hope it may be something I'm overlooking? Do the fuel pump and gauge have a common ground run that may be causing them to fail in unison? At the end of my troubleshooting rope!