As confirmed in April, the Colorado and Trailblazer models have undergone a substantial amount of Australian engineering input, which is why we're likely to see more of these test vehicles on the road leading up their launches later this year.
Australian engineers have been working with their Brazilian and Thai counterparts in an attempt to improve steering and ride, along with noise, vibration and handling.
The Colorado and Trailblazer will both feature a new interior with styling and infotainment changes.
While Holden is yet to confirm the local engine offering, both vehicles are expected to carry over the current turbocharged 2.8-litre four-cylinder diesel engine that produces 147kW of power and 500Nm of torque.
The Colorado is expected to be offered with both six-speed manual and six-speed automatic transmissions, while the Trailblazer will likely retain its six-speed automatic-only status.
The vehicle pictured appears to be fitted with a number of accessories. Holden is understood to be working on optional genuine accessories - as Toyota did with HiLux and Fortuner - that will allow buyers to fit genuine parts covered by warranty (such as the bull bar and additional driving lights fitted to the Trailblazer pictured).