1969 Holden Monaro GTS Australian FacebookTweetPin 1969 Holden Monaro GTS Australian. The Holden Monaro is a muscle car that was produced by GM Holden an Australian subsidiary of General Motors. FacebookTweetPin Related 1968 Plymouth Road Runner 383 Coupe | Muscle Car 1966 Mustang 1970 Plymounth Cuda Dodge Challenger Old vs. New 1968 Dodge Charger 1968 Dodge Charger