87 c10 fuel gauge wiggles....

[Zeked]

My 87 short/step has a problem with the fuel gauge... the thing wiggles!  Both tanks, and it reads correctly when the truck is still.

As I drive it bounces.... does not matter the amount of fuel in the tank(s).    Is there a resistor on the printed circuit plastic that should dampen this behavior?

Thanks

Zeke

[Marc]

Most older GM products I have had do this...I've always chalked it up to the gauge design, which isn't a slow-reacting thermal type...it uses some sort of magnet affair.

[emr_09]

Mine do this to and I have always wondered what causes it. I wonder if the aftermarket tanks dont have baffles in them or something to keep the fuel from slashing around

[Captkaos]

It is the design of the sending unit that causes it to float around.