: Evap Vent Valve setting P0449 and P0455?

06-12-12, 12:45 PM
Hey guys,

I had P0449 set about two weeks ago and then P0455 and set a couple times since then. Car's at the dealer right now and they're telling me the Evap Vent Valve is bad. Sounds logical, only problem is they want $33 for the part and about 4 hours of labor to replace it? Apparently it's up above the diff? So the 4 hours involves dropping the exhaust, dropping the diff and then replacing the vent.

Anyone know of a clever/cheaper way to get that valve replaced?


06-12-12, 01:02 PM
4 hours is the standard flat-rate allowance for that task. The Service Manual instructions for replacing that valve starts with "remove the evap cannister" and the instructions for removing the cannister begins with "remove the rear frame." I don't see any shortcuts looking at the Service Manual, but perhaps someone else will.

06-12-12, 02:08 PM
Thanks Darkman at least the quote sounds legitimate. Still sucks spending 4 hours to replace a $33 part.

Cadillac Cust Svc
06-12-12, 03:14 PM
Sorry to hear about your frustration, Andringa! If you'd like, I could contact your dealership to get more insight into their labor costs. Feel free to send me a PM if you'd like me to explore that (or anything else!) further for you; sending the last eight of your VIN is always helpful to help expedite my research.


Cadillac Customer Service

06-13-12, 01:59 PM
Thanks for the offer Katie, I have a great service writer who explained why it would take them 4 hours to replace it. I was just hoping that somebody may have found a faster DIY way to fix it.

06-19-12, 07:25 AM

06-20-12, 12:37 PM
Thanks again for the info.

06-21-12, 10:02 AM
Got the vent replaced last night in a bit under three hours. On the way home DTC P0449 set again. Looks like I'll have to dig a little deeper to figure out what's going on.

06-21-12, 10:16 AM
See attached.

04-21-15, 11:45 AM
Nothing's attached.

04-21-15, 01:16 PM
See attached.