According to the 2005 Toyota Highlander owner's manual, the vehicle has a 17.7-gallon fuel tank. When the low fuel warning light illuminates, there is approximately 2.7 gallons of fuel remaining in the tank. Assuming an average fuel economy of 20 miles per gallon, this would mean that there are approximately
54 miles of driving range left after the gas light comes on.
However, it's important to note that this is just an estimate, and the actual driving range may vary depending on factors such as driving conditions, traffic, and the condition of the vehicle. It is always best to refuel as soon as possible when the low fuel warning light illuminates to avoid running out of gas.