If it's the same hose I'm thinking of I had to cut it off and buy a new 5/8" heater hose to replace it. It seemed like this is what everyone was doing at the time.

Edit: I think GM may have actually made a change to this system too. I'll have to see if I can find that info again, it's been a few years since I last looked.

 

Everything I have read says you can't remove it the hose, you have to cut it and buy a small piece of 5/8 heater hose and a clamp to reconnect it. I did this to mine and it worked fine.

 

I just did one of these friday at work. I disconnected the hose running back to the cannister and took it out as an assembly. I smashed the barb on the vent valve with a ball peen and a vice, then replaced it with the new part using the existing hose and RTV'd the connection for added insurance.

 

Edit: I think GM may have actually made a change to this system too. I'll have to see if I can find that info again, it's been a few years since I last looked.

They did make a change, but I chose the $15 option instead of the $170+ "upgrade."

If I have to break it, then that's what I'll do. I took it apart and it was almost filled with red Oklahoma dirt, so I shook it all out (big pile!) and used my air compressor to blow out the filter that is in it and the hose. Lots of dust came out of that filter and hose, so hopefully I've fixed it by fixing the part itself. If not, I'll just crush the plastic extension on the old one and install the new solenoid.

 

Well, cleaning it didn't work, so I'll have to replace it on Wednesday.

 

So, ACDelco gas cap, new vent solenoid, and I'm still getting a P0455 error code. That's the only error code. What should I check next?

 

For what it's worth:

http://engine-codes.com/p0455_chevrolet.html

 

I read that quite some time ago. That's why I replaced the fuel cap and the solenoid. Is there Northern part in the evening system I should be looking at?

 

Examine the rest of the evap system and hoses. Has to be another leak.

 

Might have to get a smoke test done on it to find the leak

 

This thread helped me change out my vent solonoid today. I used the 5/8 heater hose and a few clamps. It must have worked cause after resetting the CEL it hasn't come back on. Thanks for the great info.

 

So, ACDelco gas cap, new vent solenoid, and I'm still getting a P0455 error code. That's the only error code. What should I check next?

ahight bro there are 2 solenoids... 1 @ the gas tank = vent solenoid .. and 1 @ the intake = purge solenoid.

sounds like you replaced the 1 @ the gas tank.... IMO - replace the 1 under the hood.( purge solenoid )

posted a pic of the rear solenoid with new hose attached. Oreilly auto parts

 

Did you clear the code with an OBDII scanner. It might be fixed but the computer just hasn't cleared the code. I got a code on my daughters cobalt and the fix was a new thermostat. I replaced the thermostat but code didn't go away. I hooked up my Bluetooth OBD2 and Torque app and cleared the code. Problem solved for almost a year now.

 

ahight bro there are 2 solenoids... 1 @ the gas tank = vent solenoid .. and 1 @ the intake = purge solenoid.

sounds like you replaced the 1 @ the gas tank.... IMO - replace the 1 under the hood.( purge solenoid )

posted a pic of the rear solenoid with new hose attached. Oreilly auto parts

Ah, so there's one under the hood as well! I'll check that out next. And yes, I replaced the one at the gas tank. The hose didn't want to fit on the replacement very well, but I got it wedged on there so tight I don't think I'll be able to get it off in the future.

Did you clear the code with an OBDII scanner. It might be fixed but the computer just hasn't cleared the code. I got a code on my daughters cobalt and the fix was a new thermostat. I replaced the thermostat but code didn't go away. I hooked up my Bluetooth OBD2 and Torque app and cleared the code. Problem solved for almost a year now.

I have a bluetooth-enabled OBDII scanner that I use to read codes, clear them, monitor tranny temp, coolant temp, voltage, fuel economy, shift delays, speed, rpm, air cfm, etc. This is an error that pops up randomly. The DIC will chime with a "tighten fuel cap" message, then a couple starts later the light comes on with the same error code. I clear it, and it may be a week before it pops up again. I also got a P0430 a couple times several months ago, but it hasn't happened for quite some time, and it is unrelated (although it might help explain why my volumetric efficiency is only at 65% and my fuel economy sucks...)

 

Just FYI if that hose that you wedged on the new solenoid by the gas tanks is not totally sealed off ( meaning no leaks) you will throw the check engine light on AGAIN ..... put some soapy water to test for leaks