AM Radio for Every Vehicle Act of 2023 This bill requires the Department of Transportation (DOT) to issue a rule that requires all new motor vehicles to have devices that can access AM broadcast stations installed as standard equipment. (AM broadcast stations are often used to deliver emergency alerts and news and entertainment programming; some newer vehicles do not include AM equipment.) Specifically, this bill applies to motor vehicles manufactured in the United States, imported into the United States, or shipped in interstate commerce after the rule's effective date. The DOT rule must require all such vehicles to have devices that can receive signals and play content transmitted by AM broadcast stations or digital audio AM broadcast stations installed as standard equipment. Prior to the effective date of the rule, manufacturers that do not include devices that can access AM broadcast stations as standard equipment must inform purchasers of this fact through clear and conspicuous labeling. DOT may assess civil penalties against any manufacturer that fails to comply with the mandate. The Department of Justice may also bring a civil action to enjoin a violation. Further, the Government Accountability Office must study and report on whether a reliable alternative communication system exists for delivering emergency alerts and consider the (1) cost to drivers and passengers of receiving communications through an alternative system, and (2) cost and time required to develop and implement an alternative.