The Sierra track and numerous Vision GT cars were added via free patches, not DLC. Connect your legitimate PS3 to PSN and let the game update.
After downloading all parts, users would: Gran-Turismo-6----All-DLC--BCES01893.part3
(part1, part2, etc.) in the same folder to reconstruct the original data. The Sierra track and numerous Vision GT cars
While individual "parts" are just segments of the full archive, the complete collection typically unlocks: Gran Turismo 6/Car List users would: (part1
The file extension .part3 signifies that the original game data was too large to fit into a single container, so it was split into segments (usually Part 1, Part 2, Part 3, etc.).
The promise of “all DLC in one click” is a common trap. Real risks include: