Return to sender

MY VX Series II Commodore has the same fuel-gauge problems others have reported in the Carsguide, but unlike them I've had no luck with Holden customer help. After many phone calls the end result is I take my car to my local dealer and have the fuel sender removed from the tank. If a manufacturing defect is found, Holden will look at my claim again. With so many complaints, it is clearly a manufacturing problem. What else could it be?