The range debuted alongside the smaller VE series Holden Commodore, which the Caprice shares its "Zeta" platform with, on 16 July 2006 at the Melbourne Convention and Exhibition Centre.

[3] The car's main target market was to senior Federal and State politicians, government officials, businesspeople and private buyers in Australia and overseas.

[6] Starting in 2006, Holden offered the WM series in two trim levels: Both trims featured common leather-wrapped steering wheels, 8-way power adjusting drivers seats, reversing sensors, built-in fog lights and LED taillights, as well as a Holden-developed MP3/CD/radio infotainment system with a 6.5-inch colour screen, 3.5 mm auxiliary audio input and Bluetooth connectivity for phone calls.

Options across the range included a GPS navigation add-on for the infotainment system, sunroof, full-size spare wheel and a limited slip differential.

The Statesman's LY7 V6 was replaced with the new direct-injected LLT V6, while the Caprice received the L77 V8 with GM's Active Fuel Management cylinder deactivation technology.

Holden's tri-zone climate control system was carried over from the WL Caprice, allowing regulation of the car's temperature at three separate places inside the cabin.

The exterior remained similarly unchanged, except for new wheel designs and the chrome boot garnish, which was modified to house the reversing camera.

Various new safety and convenience technologies were implemented, including trailer stability control, rear cross traffic alert, backup camera, blind spot monitor, lane departure warning system, forward collision alert, HUD (head-up display), electric park brake, electric-assisted steering, automatic parking and keyless entry and ignition.

The WM Caprice originally came standard with the 6.0-litre L98 V8 engine, producing 270 kW (360 hp) coupled to the GM 6L80E six-speed automatic transmission as featured on sports Commodore variants.

[10] The WM series 2 update also received Holden's new 210 kW (282 hp) 3.6-litre SIDI direct injection V6, paired to the same automatic transmission.

Emphasis was placed on considering the range of impact scenarios that occur in real world accident situations and differing occupant criteria.

Safety technologies were benchmarked along with the world's leading luxury brands and major engineering programs delivered a stiffer body structure and vastly increased usage of advanced strength steels.

Structurally optimised crush zones absorb crash energy and other occupant protection features include a steering column ride-down mechanism and breakaway brake pedal.

[7] Tuning house Holden Special Vehicles released their version of the top-spec Caprice, the E1-series Grange, for the Australian and New Zealand markets in 2007.

Along with other E series HSVs, the E3 Grange received HSV's EDI (Enhanced Driver Interface), and add-on to the iQ system that provides real-time dynamics, race, performance and engine statistics.

Like the Caprice, the Gen-F Grange continued with the same drivetrain and same unchanged exterior as the preceding E2 and E3 series, but gained new 20-inch staggered alloy wheels.

Inside, it received the brand new interior, dashboard, rear seat entertainment and MyLink infotainment upgrade from the WN Caprice, and featured unique HSV-branded suede dashboard trim, extra battery and oil pressure gauges, paddle shifters and the latest version of HSV's EDI system.

[21] The car enjoyed a positive reception in the US, with near perfect scores in an assessment by the Los Angeles County Sheriff's Department, and the only criticism being directed at over-cautious electronic stability control.

[22] The car's final update for 2017 made standard a limited-slip differential with the V6, a vinyl rear bench seat with seat-back security panel, and an 18-inch full size spare wheel.

Inside, it gained an all-new Buick-designed dashboard with a new infotainment system, analog clock and woodgrain trim with chrome highlights.

The interior doors were redesigned to accommodate new aircon vents, a different, chromed and backlit handle design and expandable map pockets.

The Park Avenue also added rear sunvisors, a passenger-side seat-mounted fold-down table, auxiliary AV ports and built-in window sunshades.

[26] The Veritas is very close in specification to the Middle Eastern Chevrolet Caprice Royale, with a similar plain slatted grille and Daewoo hood ornament.

[27] The Veritas gained its own unique features not used on other Caprices, including an internal air purifier system, power-folding side mirrors and an extra bank of navigation and infotainment controls located near the shifter.

In 2008, the small-scale German manufacturer Bitter launched the Vero, an imported, modified WM Caprice, after first showcasing it at the Geneva Motor Show.