* Compressor: Located on the engine, usually driven by a belt. The high-pressure and low-pressure lines connect directly to it.
* Condenser: This is a large radiator-like unit typically positioned in front of the radiator itself. The high-pressure line from the compressor connects to it.
* Receiver/Drier (accumulator): Often found near the condenser, this component filters and stores refrigerant. Lines connect to and from it.
* Evaporator: Located inside the vehicle's dashboard (inaccessible without disassembly). The low-pressure line connects to it. You won't see this line externally.
To be precise about *where* on your specific Trailblazer these lines are, you'll need a repair manual specific to that year and model. A visual diagram in a repair manual will be invaluable. Online repair manuals (like those available through subscription services) often have detailed pictures and diagrams showing the exact routing of the AC lines.
WARNING: The AC lines contain refrigerant under high pressure. Working with them requires special tools and knowledge to avoid injury and refrigerant leaks. If you're not experienced with automotive AC systems, it's strongly recommended you take your vehicle to a qualified mechanic for any AC repairs or maintenance.
