General Motors has nixed an optional hot-spray windshield washer system called HotShot from all of its cars and trucks after an electrical short in the systems caused the recall of 944,000 vehicles. GM told the National Highway Traffic Safety Administration that a short on the circuit board of the fluid heater could overheat the control-circuit ground wire. The problem has resulted in 34 warranty claims so far and three reports of fires may have been caused by the system. To fix the problem, dealers will add a wiring harness with an inline fuse, and all GM retail outlets should have the required parts to fix the problem free of charge by November 1.