2006 chevy colorado purge valve - Chevy Colorado & GMC Canyon
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post #1 of 9 (permalink) Old 06-17-2010, 10:07 AM Thread Starter
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2006 chevy colorado purge valve

Hello. I have a 2006 Chevy Colorado with what I believe is a purge valve issue. DIC code P0449. My check engine light came on a few weeks back and had a dignostic on it. code suggested I change gas cap. i did this. It worked for about a week than my light came back on. (it always comes on at START OF ENGINE) and coincidentally both times the fuel was at 3/4 a tank. Anyways, was looking for instructions and maybe pictures on how to replace this. thank you in advance.
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post #2 of 9 (permalink) Old 10-06-2010, 09:10 PM
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Re: 2006 chevy colorado purge valve

the purge valve is located on the left side of the engine block on a bracket ahead of the starter.it is easier to reach with the left finderwell liner removed.
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post #3 of 9 (permalink) Old 10-06-2010, 09:16 PM
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Re: 2006 chevy colorado purge valve

the purge valve and the vent valve is opened by the pcm when the engine is running and warmed to a preset temperature along with a few other conditions. so at start up you are saying is your engine warm or cold startup when the light comes on.
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post #4 of 9 (permalink) Old 10-19-2010, 09:01 AM
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Re: 2006 chevy colorado purge valve

Are you sure the purge valve is your problem? CEL code P0449 states Evaporative Emission Control System Vent Valve/Solenoid Circuit fault. The vent valve is located on the charcoal canister just in front of the spare tire underneeth the bed. I've removed the purge valve from my engine, just to check to make sure it works, and to do so I simply used a 12v drill battery to make sure the solenoid cycled. All was well there, so I'm leaning towards the vent valve on the canister. I believe its a different CEL code for a malfunction of the purge valve on the engine... perhaps someone knows which one.

Also, before you spend 185 bucks on one, I've read that you can buy the same part for a Silverado of the same year, and its 1/5th the cost, with the exception that you have to reuse the quick-disconnect hose that's attached to it.

2009 Colorado ex cab 4x4 I5 Z71 Auto
2006 Colorado reg cab 4x4 I5 Z71 5spd (sold)
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post #5 of 9 (permalink) Old 10-20-2010, 09:42 PM
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Re: 2006 chevy colorado purge valve

I had a p0449 a few weeks ago also. Ended up being the Purge valve not the vent vavle. Had a hell of a time getting either one. Ended up just going to the dealership to get both. I bought a Hummer h2 vent valve, i'll see if i can get the part number for you off my invoice. And just bought the 06 purge valve. But i'll tell you the stupid purge vavle was a pain the ass to get in only because i got big head that doesn't enjoy such a small spot. You need to take the driver side front wheel off, and the wheel splash guard. I also too off the battery and battery box, loosened up the wiriring harsnass stuff there to get my hand in it. Make sure to take off the 2 hoses first one is kind of a quick connect and the second is the pinch type, and the eletric connect then unbolt it. But the vent valve is a piece of cake.

Problem i had with looking through the old p0449 threads on the forum was it wasn't clear to me then that the vent valve is on the canister by the spare tire and the Purge valve is on the driver side of the engine block under the intake manifold.
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post #6 of 9 (permalink) Old 02-19-2014, 05:28 PM
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Dorman 911-070 Vapor Canister Vent Solenoid $78.42 @ stockwiseauto.com

Dang dealer want's 300+
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post #7 of 9 (permalink) Old 12-20-2014, 02:39 PM
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what if you just ignore the dam thing what will it hurt
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post #8 of 9 (permalink) Old 12-20-2014, 03:00 PM
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If you live where there are no vehicle inspections, not correcting the problem probably won't affect the operation of the truck much, if any. If the vent solenoid sticks closed it can affect fueling. With the vent closed the fuel pressure has less of an area to vent and can keep shutting off the pump. The "check engine" light will remain on so you will not know if another problem occurs, that might be more serious.
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post #9 of 9 (permalink) Old 12-21-2014, 09:08 AM
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Even thought this is a dead-thread resurrected...ignoring any code/repair can cascade into bigger problems.

The "Iceman" Cometh
MSGT, USAF (Retired)
06 Colorado Z71 4X4 Crew (Lil Red)
Born in the US of A!
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