Holden launched the HG as the third and final facelift of its HK/HT/HG series in July 1970, coinciding with the introduction of the Tri-matic automatic transmission. Offered in four-door sedan and station wagon body styles, the HG shared its remaining bodywork with the HK/HT models. Trim levels included Belmont, Kingswood, Premier, and Brougham. The engine options consisted of six and eight-cylinder variants, ranging from the 161ci six to the 350ci V8, paired with six different transmission type