Fuel guage blocks on circuit board

[torquey]

Any idea what these do as they seem to adjustable and I have 3 guages all set different? Any idea what they should be set too?

[millworm]

What do you mean by blocks? GM Were pretty standardised with their gauges hence why you can even swap any period vaux and it all works. I'd only put any variation down to bad wiring or degradation in the guage itself

[torquey]

2 small beige blocks they have a control on them which seems to be adjusted using a small screwdriver all my guages are set differently so was wondering what they should be at? Checked all the wiring which is fine.