Where is 99 Chevy lumina 3.1 v6 AC service port?

The AC service port location on a 1999 Chevy Lumina 3.1L V6 is typically on the front of the compressor itself. However, it's *not* always easily visible. You'll likely find it near the compressor's top or side, and it will have a low-side and high-side port, usually colored blue (low-side) and red (high-side), respectively.

Because it can be difficult to spot, it's highly recommended to consult a repair manual specific to your 1999 Chevy Lumina 3.1L V6. These manuals provide diagrams and detailed descriptions to precisely locate the ports. Using a repair manual will ensure you correctly identify the ports and avoid damaging the system.

Trying to locate it without a proper diagram risks accidentally damaging other components under the hood.