Other Fuel System Tank Mounting problems of the 2003 Chevrolet Blazer

As the owner of a 2000 Chevrolet Blazer, coup (VIN: 1gncs18w8yk274737) I was looking forward to continue purchasing Chevrolet vehicles in the future. However, a recent experience has made me hesitant in this regard. When I recently noticed that my gas gauge was giving questionable readings and I had no idea as to the amount of fuel still remaining in the tank I took the vehicle to the mechanics at selman Chevrolet in orange. It was, indeed, determined that the fuel gauge sensor was not functioning correctly, but much to my chagrin I learned that it is not covered under warranty. This includes the extended warranty that I purchased from glendale Nissan (member # qrdv09315519) obviously I was surprised that an item so vital to safety is not covered. I can understand if it were an item requiring replacement after so many miles, but that is obviously not the case. I drive in heavy freeway traffic every day, many times with my 4 year-old daughter, and should I run out of gas the results would be disastrous if not deadly. In such a case who would be responsible if the vehicle ran out of gas due to a faulty reading of the gauge? are you aware that this item malfunctions and if so should it not be considered as a cause for recall or at the very least replaced at no cost to the customer? I have a number of concerns, one of which is whether or not you authorize the sale of a warranty (I purchased this as a pre-owned vehicle with approximately 25,000 miles on it from a reputable dealer) on your vehicle that has such limited coverage as the one that I purchased? also if I were to have purchased this vehicle new, would this item still be covered under the original warranty?.