Imported vehicles from within GM have supplemented these Australian-made cars, providing Holden with a full range of models.
While the majority of Holden cars follow this double-letter format (not necessarily based on platform), anomalies exist.
The "V2" code applies to the 2001–2004 Holden Monaro, with "V" indicating the V platform architecture and the "2" possibly referring to its two-door body style.
The three-letter codes assigned to the WFR series Holden Shuttle and UBS Jackaroo are the remaining incongruous designations.
Derivative versions with unique body styles, like the Monaro coupe often share the series code with their donor model.