Fuel Gauge Reading Empty No Start

[Dtroutman]

Hello,

I'm new to the group and wanting to see if anyone has heard of my current ground problem I'm having on my 2001 tahoe 5.3. 

Originally, tahoe began with no start then wiggled my neg side on battery post turn key off/on and would start. After couple of days doing this procedure, I tighten the batt neg side and tahoe drive fine for approx 3 days or so. 

A normal early morning I turned key on and noticed my message blinking empty and fuel gauge reading empty, when previous night I pumped in 20.00 worth of fuel. 

Check 1. Relay, the  ecm fuse 2, ECM fuse 1, rechecked neg, did a system reboot bat off 30 min fuse out and relay out, etc...no luck. I jump the prime with hot wire from bat and boom it worked. Drove for 1 day and problem came back. 

I replaced fuel pump thinking sending unit out, problem continued. When it's not functioning, I'm not getting a continuous 5v to the level sensor, so replaced wiring harness at tank, no change. Hot wire prime again, no change, hot wire relay...pump engaged and fuel reading half and it started. 

So now I'm thinking ground issues... I traced and cleaned the following:

Batt neg to front frame/driver block

Ground strap driver side to body

Ground under driver door 

Ground strap fuel cap to rear frame. 

It seems to start as of now, but not sure if problem will continue because at those ground contacts my fuel gauge wouldn't ever read empty when those were disconnected for cleaning. 

I do not see a ground strap on passenger side behind motor, what am I missing? Pcm connection looks perfect with no corrosion on contacts. Any advice would be great. Sorry for the book...

[riverbanks]

You mentioned you jumped the hot wire and it worked,so power problem not ground,I would investigate feeds to relay center, sometimes you think you have good power,but under load is a good testing method,while cranking when problem appears, check voltage at fuses,or a wire wiggle test while it's good and try to make it misbehave