Can someone tell me where the ac drain line is on a 99 silverado? I found the rubber elbow up by the canister but was wondering if there was one under the truck as well, I think mine may be clogged and want to blow it back up rather than try and blow down towards the ground

 

I don't exactly know Chief. But remove the elbow, with some canned air, blow through it . I read your other post about water in the cab, or carpet. It certainly could be a plugged plenuim drain.

 

I am thinking along the same lines but would rather blow the clog against the normal direction of flow, thinking it would be easier

 

Well, yes if you have the end of the tube, but I thought you psoted asking where the draim was? If you know where the end is, sure do that.

 

I did ask where the drain was, I see the one on the firewall but wasnt sure oif there was one on the bottom of the truck. Tried blowing and sucking on the drain elbow but nothing moved either direction.

 

Chief, the elbow that you pulled off, is it on the plenum, and did any water come out of it?

 

You may have to help me with what the "plenum" is and no, no water came out.