AC Drain

RickSt · July 4, 2023

Sorry if I missed this topic - I think my AC drain is clogged/partially obstructed. Sometimes I see fluid draining after running the AC, but often I don't. No issues with water anywhere in the passenger side compartment, but I am getting the musty smell. I removed the right front tire and searched, including removing a heat shield next to the exhaust and still nothing that was visible. Does anyone know where this drain tube exits the underside of the vehicle, and/or is there any way I might be able to blow it out from the evaporator end? Of course I'm sure that would involve taking the front half of the truck apart! 2020 Silverado 2500. Thanks.

newdude · July 4, 2023

Behind and just below the right rear cylinder head in the firewall. Above the transmission. Rubber grommet with a diaphragm looking end in the center of it.

RickSt · July 5, 2023

Perfect! Showed the pic to my kid who's a Mazda mechanic - he went outside, climbed up on the engine and found it instantly! Thank you.

Joshua Telecaster · August 14

On 7/4/2023 at 5:54 PM, newdude said:

Hello do you know where the drain is on a 2020 Blazer?

Behind and just below the right rear cylinder head in the firewall. Above the transmission. Rubber grommet with a diaphragm looking end in the center of it.