2007 yukon xl....gas tank hisses (pressure) when truck is running with gas cap OFF????

[gbtbrs]

2007 yukon xl....gas tank hisses NONSTOP (pressure) when truck is RUNNING with gas cap OFF????

 

[Fless]

Moved you here from Site News so the right people will see it.

 

[petethepug]

Eww Buoy, you’ve got Sea Hags in there. Call a specialist.

Seriously though, how does the truck run otherwise?

Could it be that you have z55 air suspension and one of your lines has a leak!

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

 

[Doubeleive]

2007 yukon xl....gas tank hisses NONSTOP (pressure) when truck is RUNNING with gas cap OFF????

ok....
check engine light on?
had any work done to it?
mileage?
video of said hiss?
to present a video, record it - more than a few seconds video, then upload it to youtube and share the link here.