06 lbz fuel gauge issues

[tanman_2006]

My fuel gauge drops to E w/ low fuel light on if left idling for bout 5 min.

Is this a gauge problem? Most of the back lights on my cluster are out so replacing wouldn't bother me.

Also, my truck decided to reset its hrs...

 

[THEFERMANATOR]

Are you refueling when it does it? If the ECM detects a change in fuel level it doesn't think should take place, it will drop the fuel level to E and turn the light on. If it was a stepper just the needle would drop, and if it was a coms issue all of the gauges would drop. Sounds like either a problem with your level unit, or a software issue. Some early flashes had problems with the gauge dropping.

 

[tanman_2006]

Never did it until recently, after 3yrs and over 100k miles you would think it would have shown up sooner.

It does it anytime I park and leave my truck running for heat, been 20* the past few days. Does it when I start it in the AM and go back in for coffee, fed cattle and it was showing low when I got back from breaking ice, got out to release coffee and it did it again (I think you get the idea)

I fuel up w/ it running all the time, it just takes a while for the gauge to come up

 

[WarWagon]

Hour reset it typically a bad battery or otherwise low voltage when cranking. The fuel level senders are a better design than in the past, but, still fail.

 

[tanman_2006]

I'll load test the batts, it bogged when I started but it was 2* this AM and I just figured that's what caused. Batts were new last yr.