The 1989 GMC Sierra 3500, part of the third generation, is a full-size, heavy-duty, rear-wheel-drive pickup truck with available four-wheel drive that can handle heavy payloads and towing tasks. It's powered by various engine choices, including a robust 7.4L V8 engine. This model was famous for its durability and strong work ethic, but was more utilitarian than luxurious, featuring a functional and interior design. Standard equipment included an AM/FM radio, power steering, and front disc brakes. Despite the absence of modern technology and driver-assist features, the 1989 Sierra 3500 stands out as a classic workhorse from GMC's history.