2004 Yukon XL fuel tank vent issue?

[jessalynn87]

I have had my '04 for about 2 1/2 years now, and after replacing my fuel pump, the "Tighten Fuel Cap" message would flash across my DIC on occasion. I didn't really give it much thought because it would only happen every now and then, and figured it was triggered by something when the tank was dropped to replace the pump.

About two weeks ago, the fuel gage started acting wonky. dropping radically and then resetting when i would restart the vehicle. i stopped to fuel, and when i loosened the fuel cap, a huge amount of pressure released, along with strong gas fumes. i filled my tank, and all was wel until i got to about a quarter tank of fuel and the gage started up again.

i replaced the gas cap, thought that might fix the venting issue, and it has not, if anything it made it WORSE! i am getting the CEL codes read this afternoon, but was looking for some suggestions on possible parts that might need to be replaced so i can get them priced.

anyone been through this before or know what it might be?

 

[Sasquatch]

I`m not sure why your fuel gauge would be doing that but the tighten gas cap message usually means your evap solenoid is bad. It`s a cheap part and pretty easy to change. I got the same message last month and changing the solenoid fixed it. http://www.partsgeek.com/gbproducts...+Google+Base&gclid=CLSrk86T7r8CFZTm7AodcTQAaQ

 

[jessalynn87]

Thanks, My CEL code was EVAP related, so i will be replacing that this weekend, hopefully it solves the issue!

 

[01ssreda4]

Changed mine, fixed it for a week or two and it started coming back....rats.