Why does the fuel gauge needle oscillate wildly when the gas tank is under half full on 1997 Buick park avenue ultra?
If the guage is acurate in the top half of the tank I would assume that the sensor mechanism is ok and that you have an electrical fault. I am not familiar with 97 buicks so perhaps look for a better answer. The lower half of many fuel gauges is problematic so do not be too concerned.
the cars are basically identical but the park avenue is better built with other wanted fetures most standered including leather seats buick park avenues throught 1997 thourgh 2005 the park avenue is about 12" longer than the lesabre i would u buy a park avenue any day over the leasbre both are great cars but for the money the buick park avenue is the way to go .