This Trailblazer SS already was an impressive 395 hp V6 SUV with a LS2 engine under the hood, ... Here, Dan removed the coolant vent crossover tube as indicated in the instructions, ...

GM has issued a TSB to address an issue with the engine coolant pipe on certain Chevy Blazer, GMC Acadia, Cadillac XT4 and Cadillac XT5 crossover models.