The HK series was initially offered in three trim levels, each available in four-door sedan and five-door station wagon body styles.

The Premier nameplate was retained for the top-of-the-line model, which now featured four headlights and a unique roofline to differentiate it further from its lesser siblings.

In March 1968 the HK range was expanded with the release of two coupe utilities and a panel van variant[4] replacing the existing HR series commercial models.

[5] July 1968 saw the release of an additional HK sedan and three coupe models:[6] The Brougham featured a greater level of luxury than the Premier, which had been the top of the range Holden since the introduction of the nameplate in 1962.

[1] They went on sale in May 1969 after two years' development and quickly became General Motors best seller in the country, along with the closely related Constantia.