High Quality Ignition Replacement. The Ignition Lock Cylinder with Keys is a reproduction part designed to replace worn or damaged ignition lock cylinders in GM cars and trucks. It allows for smooth and secure operation of the ignition system, helping to start the vehicle reliably and preventing issues caused by faulty cylinders.Construction and Appearance. This lock cylinder is manufactured using durable materials to ensure longevity and consistent performance. It closely matches the original equipment design and finish, providing a direct fit with included keys that match the replacement lock for seamless integration.Installation. Installation requires basic mechanical skills and does not involve drilling or modifications. It is designed as a straightforward replacement to facilitate quick installation and return to service.Application. This product is specifically fitted for late 1978 through 1988 Pontiac Firebird models and is strictly for 2nd series 1978 model GM Squarebody trucks, ensuring compatibility within this generation and line.