How to: Replace your Evap Canister/Solenoid (P0455 code) - Chevrolet Colorado & GMC Canyon Forum
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Old 07-07-2012, 12:33 PM   #1
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How to: Replace your Evap Canister/Solenoid (P0455 code)

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A 355nation How To presented by
Josh

Project Name
How to replace your evap solenoid/canister to cure code P0455.

Project Description
In this How-To, I will guide you through replacing the evap solenoid/canister under your truck in hopes of curing a P0455 code, for about 1/4 the price of using the "proper" GM part.

Skill Level
Easy, 1 beer

Project Vehicle
Make: Chevrolet
Model: Colorado
Year: 2006
Engine: 2.8L
Power windows: Yes
Sun Roof: No

Tools Needed
12mm socket, ratchet
Flat screwdriver
OBDII code scanner or Scangauge (optional)

Project Time
30 minutes

Project Cost
Approximately $30


Many of the members here have recieved the code P0455. It's nothing to be afraid of, and dosen't affect the operation of the truck. If you're like me though, you don't like the CEL blaring at you, and I'm a stickler anyway and like for everything to be perfect on my truck. I've done some research on the forum here, and 90% of code P0455's are caused by an evap solenoid/vapor canister thing that's located under the truck, right behind the fuel tank. If you've replaced your fuel cap and still have the code after clearing the CEL, it could be likely this is causing the problem. It's easy to replace, and the actual part costs approximately $140, depending on where you buy it. I'm going to show you how I replaced it with the EXACT same part (modified slightly) and it only cost me $30.

First, some information that you'll find handy. The "proper" part is 10386359, cost $140. The other part, AC Delco part number 214-2147, cost $25. What is the difference? I kid you not, a plastic hose. The AC Delco part is engineered for H2 Hummers, etc, which we all know is the 355's cousin, so with a little addition this $25 part will work on YOUR truck.

Here's a picture of the "actual" part, and my engineered part.



See the difference? Not much of one is there? You can do what I done, and purchase a length of hose and clamps or you can opt to reuse the stock plastic hose that's on the old part. I busted my hose trying to get it off, so I had to go pick up a rubber hose and clamps.

Let's get to work.

First, you'll want to disconnect the battery cables because we will be working around fuel vapors, so safety first!

It's a world easier if you let your spare tire down, and if you've not checked the pressure in it lately, now is a good time anyway. I also took this opportunity to grease the spare tire winch cable because my spare didn't want to unwind. A little grease and all was well again.

Crawl under the truck, and you'll find this.



This is where the little canister is located. There is a single screw holding the assembly in it's steel cradle, use a 12mm socket to remove the screw and everything will be free.

Unhook the plastic tube from the right side of the box with the flat screwdriver. It'l take a little prying, but you'll eventually get it off. Over on the far left side the canister/solenoid is attached to the left side of the plastic box with a small bracket. You'll need a flat screwdriver to pry the locking mechanism up so it will slide off. Unplug the wire harness and you're loose. Time for a beer.

On my old solenoid/canister it was quite apparant why it was throwing a code. There was a huge crack in the plastic right above where the connector plugs in. I'm sure it had gotten some water in it, corroded and caused the solenoid to stick.

Now here's where you can either remove the old plastic tube and reuse it, or do what I did. Be very careful if you try to take the plastic tube off the old one, you might heat it up a little bit to soften the plastic for an easier result. I just went down to Advance, scored some rubber hose and two clamps and went on about my business. You also need to remove the old bracket from the old canister and transfer it to the new one.



Now, with the hose swapped, or a new hose installed, and the bracket swapped, finish your beer (or have another?) and get back under the truck. Re-install the new canister the way you took the old one out. It just slips on the side of the big plastic box thingy using that bracket we swapped out earlier. Plug the harness back in and attach the hose to the port over on the right side of the box, where you unplugged it earlier.



If you're using a hose and hose clamps make sure they're all tightened good.

Now, you can remount the box using the single screw. It goes in from the top and was kinda aggravating to get to because of some other plastic lines but just take your time and you'll get it tightened up. Congratulations, you're done. Now just raise your spare tire back up, and clear the code!



If you don't have a code scanner, Advance will scan it and erase the code for free. A Scangauge or Ultragauge will also work, or you can purchase your very own code scanner from Advance, O'reilly or Autozone. I think Walmart even has them now.

Also, as a reference:

Evaporative Emission Canister Vent Solenoid Valve Replacement

Removal Procedure
  1. 1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.


  2. Disconnect the electrical connector from the evaporative emission (EVAP) canister vent solenoid valve (4).
  3. Disconnect the EVAP canister vent solenoid valve (4) from the EVAP canister (5). Refer to Plastic Collar Quick Connect Fitting Service .
  4. Disengage the bracket retaining tab and remove the EVAP canister vent solenoid valve (4).
Installation Procedure


  1. Slide the EVAP canister vent solenoid valve (4) over the bracket.
    Ensure the valve (4) is properly retained to the bracket.
  2. Connect the EVAP canister vent solenoid valve (4) to the EVAP canister (5). Refer to Plastic Collar Quick Connect Fitting Service .
  3. Connect the electrical connector to the EVAP canister vent solenoid valve (4).
  4. Lower the vehicle.
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Old 08-20-2012, 07:11 PM   #2
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Nice write up Josh.
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Old 08-20-2012, 07:30 PM   #3
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Nice write up!

I did this a couple months ago on my 2005. I used the hummer part number, it was an exact match. I didn't have a scanner to clear the code, but after my third start of the engine I was driving down the road and the cel cleared on its own. Been out ever since!
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Old 08-20-2012, 07:38 PM   #4
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Great write up!
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Old 08-20-2012, 09:09 PM   #5
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Great write up...just in time. At The Skunkwerx meet this past weekend we changed out the one on the block....It's still throwing the code so I'll be changing this one next weekend.
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Old 10-01-2012, 02:07 PM   #6
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Great write up, just did this yesterday and saved A LOT of money! Thank you.
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Old 12-10-2012, 02:53 PM   #7
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

This is the second time my truck has had the p0449 code. The first time (4 years ago) I ordered the part from gm parts direct. About a month ago the code came on again. I really didnt want to order the part again for 90 bucks. Im glad I found this thread and saw that the hummer part would work.

I bought it today along with the hose and installed and I just drove it around for about 20 minutes and so far so good.

Thanks for this thread. I love this site.

Last edited by 713832281; 12-10-2012 at 03:23 PM.
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Old 01-06-2013, 02:45 PM   #8
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Just did this yesterday worked out perfect. Light went off after driving about 10 min or so. Thanks for the right up


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Old 01-31-2013, 05:41 PM   #9
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

got the parts have to wait for the evap to come in tonight will be doing this
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Old 02-14-2013, 09:31 PM   #10
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

did this today w/ the cheaper part and a hose.
just wanted to note that on my 05, the bolt was 13mm, not 12.
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Old 02-14-2013, 11:49 PM   #11
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

When I did this today all I bought was the canister, couldnt pull the hose off the old canister so I just cut it as close to the canister as I could and still had enough to re use the hose on the new canister. Just takes a little force to put the hose onto the new canister.
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Old 02-23-2013, 02:40 PM   #12
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Thanks for this how-to! Did this and saved a bunch of money. But the engine light keeps coming back after a couple days? What else could it be?

Last edited by roots808; 02-24-2013 at 06:01 AM.
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Old 02-28-2013, 02:55 PM   #13
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Did this today using the hummer part number and plastic tubing and hose clamps. I have my bed off so it was super simple. I took some pictures to show everyone of what your working with to get a little better of an idea since its hard to see.

Hope this might help some people!

An overhead view, tail lights are the rear of the truck towards the bumper. Canister is on the right. You can see the new hose and clamps.


This is the electrical plug on the canister. Just pop the red clip out and it should pull the plug right out.


Looking at the clip and electrical plug and hose.


This is the back side of the canister how its held in by. The little clip in the center needs to be pryed out some and then the whole canister pulls out.
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Old 03-11-2013, 02:02 PM   #14
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Is this the same part for a V8?
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Old 03-11-2013, 03:05 PM   #15
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

I need to do the damn vent tube shit.....tired of gas blowing back at me when I fill up
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Old 03-16-2013, 10:13 PM   #16
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

replaced the canister and also the solenoid with the H2 part (214-2147). Brand new canister, new solenoid, and new hose (not plastic) and drove over 200 miles today. Guess what my service engine light is still on. Took it back to AutoZone and it's pulling the same code dealing with the vent solenoid. They wanted me to buy some Gumout Fuel Treatment and Safeguard Ehtanol stuff, just wanted to ask what am I doing wrong?

Do I need that treatment stuff, do I need to disconnect the battery, any ideas?
Trying to get it done since inspection is this month.
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Old 04-12-2013, 10:00 AM   #17
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

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Originally Posted by doodle153 View Post
replaced the canister and also the solenoid with the H2 part (214-2147). Brand new canister, new solenoid, and new hose (not plastic) and drove over 200 miles today. Guess what my service engine light is still on. Took it back to AutoZone and it's pulling the same code dealing with the vent solenoid. They wanted me to buy some Gumout Fuel Treatment and Safeguard Ehtanol stuff, just wanted to ask what am I doing wrong?

Do I need that treatment stuff, do I need to disconnect the battery, any ideas?
Trying to get it done since inspection is this month.
try having them clear the code and if it comes back, then worry about it. It may be that your truck just isn't clearing the code itself.
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Old 04-21-2013, 01:36 AM   #18
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

Just did this last week, it cleared a P0449 Ive had for over a year. Super easy. I know the thread is somewhat old but I couldnt have done it without the walkthrough.
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Old 04-21-2013, 10:34 AM   #19
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

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Old 04-21-2013, 10:52 AM   #20
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Re: How to: Replace your Evap Canister/Solenoid (P0455 code)

I threw this code right before my motor blew, thanks for reminding me to fix it. Good write-up Josh!


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