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2003 sierra - vent solenoid question

crobinson95

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crobinson95 Enthusiast

crobinson95

Posted
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I'm new on here and have a 2003 gmc sierra 1500 sle ext cab z71. I have been getting the P0446 code so I looked on here and found lots of information regarding it. I found the tsb about it and order the part it called for - ac delco 19258957 and received it. I see the old one up on the frame over the gas tank at the front of the bed.

The old one is rectangular in shape and the new one seems bigger and round. My question is do I have the correct part does it just bolt up in the same place?

 

Is it possible to replace this without removing the bed? I am not sure if I can unplug the old one and plug the new one in with the little bit of space I see there.

 

Thanks for any help.

Nanotech Environmental Enthusiast

Nanotech Environmental

Posted
Posted

I'm new on here and have a 2003 gmc sierra 1500 sle ext cab z71. I have been getting the P0446 code so I looked on here and found lots of information regarding it. I found the tsb about it and order the part it called for - ac delco 19258957 and received it. I see the old one up on the frame over the gas tank at the front of the bed.

The old one is rectangular in shape and the new one seems bigger and round. My question is do I have the correct part does it just bolt up in the same place?

 

Is it possible to replace this without removing the bed? I am not sure if I can unplug the old one and plug the new one in with the little bit of space I see there.

 

Thanks for any help.

Had the same issue. You can get it out, but IMO, it would be dumb to put it back in the same location, if you can avoid it.

Here's what I did;

http://www.gm-trucks.com/forums/topic/83753-evap-vent-valve-location/?p=1718115

Nanotech Environmental Enthusiast

Nanotech Environmental

Posted
Posted

All you have to do is slice & remove the factory tape that wraps the corrugated plastic cover, then pull the wiring for the solenoid out as far as you need. Re-tape everything back up when you're done.

  • 1 month later...
crobinson95 Enthusiast

crobinson95

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I finally got around to replacing the parts. After I finished I cleared the code and started the truck. Before it move 100 feet the light was on again but this time it is reading P0449. From what I have found on this site the codes seem to be almost the same thing. What else can I check? I'm thinking I either have another issue or a defective part. Any thoughts?

Thanks

Nanotech Environmental Enthusiast

Nanotech Environmental

Posted
Posted

I finally got around to replacing the parts. After I finished I cleared the code and started the truck. Before it move 100 feet the light was on again but this time it is reading P0449. From what I have found on this site the codes seem to be almost the same thing. What else can I check? I'm thinking I either have another issue or a defective part. Any thoughts?

Thanks

You have to drive it on and off for a few days in different environments to get everything to clear.

tbarn Senior Enthusiast

tbarn

Posted
Posted

P0449 is an electrical issue with either the new solenoid or the wiring. Code cleared is code cleared. No driving required.

crobinson95 Enthusiast

crobinson95

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What is the best way to determine if the problem is the truck - wiring or the new part? I have a basic innova 3030 scan tool and innova 3320 multimeter.

crobinson95 Enthusiast

crobinson95

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Ok - so I kept looking on the internet and found something about a fuse so I checked and had a blown fuse under the hood. After replacing that, I cleared the code took the truck for a ride and within a mile the light came on again. Now it is back to the P0446 code. I am beyond frustrated with this truck it seems to have had every issue the 2003 trucks are known for. Any suggestions on what else to check?

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