The Trailblazer comes with the LS2 engine and this is a LS1. Meaning this is the older corvette engine. In the states it came in 4 cars the Camaro, SSR, GTO and the Corvette. The Hood design shows it not the corvette coz corvette hoods open in the other direction and expose the wheels. And it is not the Camaro, coz in the Camaro the engine is nestle in the firewall a bit
So from what I can tell it is either the GTO mostlikely or the SSR pickup. Or it is form one of the Australian counterparts who pioneered the trend of having the LS series engine in normal sedans. And the location of the brake fluid and design of the strut and other things tell me it is the GTO or Lumina or one from Holden. But the thing that makes me unsure is the corvette part written on it, none of them come from the factory with Corvette written on the engine cover unless this is a after market install.