H3 Fuel cap light

[Ballistic21]

On my dash it lit up saying fuel cap is it a common problem for a fuel cap to go bad and the warning come up on dash. Mine has 170 thousand miles but still runs good

 

[Paranormal]

Any CEL along with the Gas cap message?
I' am going through this now. My H3 has 110K. It started with the Gas cap message then it threw a code for a slight Evap leak and then a week later, it threw a code 0455 for a large evap leak. Check your fuel cap first and lube up the rubber gasket first. Most likely you will need this: DORMAN 911-070 Vapor Canister Vent Valve

I just purchased one on Amazon for $73. There are other options if you want to save a few dollars.

 

[Ballistic21]

Thank you I replaced the canister purge valve a couple weeks ago when it was throwing the 0455 code and this week a few times the fuel cap light came on I replaced the fuel cap. now tonight ill replace vapor canister vent valve I think... That looks like it may be it. Thank you so much.

 

[Ballistic21]

I was just reading this when you posted your reply.
http://www.hummerknowledgebase.com/fuel/canister_vent_solenoid.pdf

Do you think it can be cleaned like that or is that just on the h2?

 

[Paranormal]

I was just reading this when you posted your reply.
http://www.hummerknowledgebase.com/fuel/canister_vent_solenoid.pdf

Do you think it can be cleaned like that or is that just on the h2?

Ours is located in front of the gas tank. I have read that cleaning has been attempted but sometimes, it still has malfunction. Most likely yours may be the original. After 170k miles, chuck it in the garbage.

 

[Ballistic21]

Thank you I will for sure I'm just going to replace it for sure. Did this fix yours?

 

[Paranormal]

Thank you I will for sure I'm just going to replace it for sure. Did this fix yours?

Waiting for it in the mail. I'll post next week after I receive it and install it. I had the same issues as you and as many others from what I have read in several forums. The fix appears to be the solenoid valve. I have checked for leaks and do not have any. Hurricane is delaying my delivery so I have to wait until Tuesday or Wednesday to fix it.

 

[Ballistic21]

Thank you ill keep you posted as well best of wishes to you! Prayers to you to keep u safe thru the hurricane!

 

[Paranormal]

Thank you. I'am not in the Hurricane's path but the shipper is.

 

[Ballistic21]

https://m.youtube.com/watch?v=9qnQrVoGoR0

Changed mine tonight ill clear the code tomorrow seems to be starting and running a lot better

 

[Ballistic21]

Here's a video I found and helped me it took a 13 mm wrench and a screwdriver 10 min to change