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1993 Chevrolet Blazer K1500 Full size 4WD A/C Questions

Where do I find the a/c drain and how do I unplug it so it will drain outside the truck instead of on my passengers feet?

Does no-one know?

Look under the vehicle passenger side firewall and you’ll see a rubber tube pointing at the ground. You can clean the tube out with compressed air or use a length of string trimmer line .