Seller notes

1,000,000 cst (1M cst) Silicone Damping Fluid in an easy application syringe with a dispensing tip for easy and precise damping fluid application. Almost all GM fuel gauges (from after 1965 up to at least the early 1990s) included some high viscosity silicone fluid to slow down ("dampen") the gauge movement. Over time, that fluid can disappear (perhaps due to a leak or evaporation), and then the fuel gauge movement is too fast and underdamped. The fuel gauge has a dampening fluid internal beneat...

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