My 07 LS2 does the same thing. Very normal.
A/C Drip on Exhaust
Team Owner
Joined: Dec 2002
Posts: 32,074
Likes: 296
From: San Francisco CA
Originally Posted by red98gt
My wifes '02 GMC Envoy does the same thing...Pull into the garage and sizzle sizzle....... Scared the cr*p outta me the first time!!!! It is the condenser drain, right above the tail pipe.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The HVAC air box evaporator coil produces CONDENSATION during normal operation. The condensation needs to drain out OR it will drain into the passengers foot well.
Your drain udder is on the passengers side of the fire wall and thats where the condensation drains out of the air box. If you use the AC and dont see it draining,, thats an issue.
I dont have an an exact picture of a C6 drain but I do have one for a C5 They are simular.
All the AC and heater lines are up high on the fire wall:
Your drain udder is on the passengers side of the fire wall and thats where the condensation drains out of the air box. If you use the AC and dont see it draining,, thats an issue.
I dont have an an exact picture of a C6 drain but I do have one for a C5 They are simular.
All the AC and heater lines are up high on the fire wall:
Last edited by Bill Curlee; Jun 20, 2012 at 10:23 AM.
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
Yes, we do have to live with it 
... unless you want to dismantle the car 
. I tried to locate that stupid drain when replacing the X-pipe (an OEM '11 instead of my catted '12), and couldn't do it, even though a lot less crap was in the way. It's high up in the tunnel somewhere inaccessible. Even if I knew exactly where it was, it'd be impossible to properly attach an extension hose to it easily. And since the water just falls on the tunnel, it can drip anywhere in that area, so it's impossible to build anything to catch it either.
Bottom line is it's normal, and we DO have to live with it
. But again, why GM didn't put a proper drain line (maybe $0.10 more?) on a $70K+ car is beyond me.
... unless you want to dismantle the car . I tried to locate that stupid drain when replacing the X-pipe (an OEM '11 instead of my catted '12), and couldn't do it, even though a lot less crap was in the way. It's high up in the tunnel somewhere inaccessible. Even if I knew exactly where it was, it'd be impossible to properly attach an extension hose to it easily. And since the water just falls on the tunnel, it can drip anywhere in that area, so it's impossible to build anything to catch it either. Bottom line is it's normal, and we DO have to live with it
. But again, why GM didn't put a proper drain line (maybe $0.10 more?) on a $70K+ car is beyond me.
Last edited by JCtx; Jun 20, 2012 at 06:49 PM.
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Race Director
Joined: Sep 2000
Posts: 11,143
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From: Missouri City, TX
I am going to speculate that GM was concerned that if they had added a drip hose to direct the condensation to the bottom of the car, statistically there would have been some number of cars experience blockage of that longer hose with mildew, insect nests, etc, that would have caused a far greater problem for the owner. JMHO.
