How do you unclog rear ac drain hose 1993 gmc suburban?

To unclog the rear AC drain hose on a 1993 GMC Suburban, first locate the hose, which is typically found under the vehicle near the rear passenger side. Use a wet/dry vacuum to suction out any debris or blockage in the hose. If that doesn’t work, a flexible wire or a plumber's snake can be inserted gently into the hose to dislodge the clog. Finally, flush the hose with water to ensure it is clear and functioning properly.