I’ve had this leak for some time now and it’s only active when the car is running. Noticed a gas smell a few weeks back and took it to a shop to get a solenoid swap. Now I notice this and idk what kind of leak it is. It’s a 2006 hummer H3. Anyone know what kind of leak and how much it would cost to repair ? I’m in Baltimore MD so if you can refer me to a mechanic with fair prices around here then that will be great

 

looks like it could be fuel or brake fluid from the location you showed. if you get a strong fuel smell from the drivers side passenger door then you need to inspect the fuel pump and lines for holes.very common issue.

 

Stick your fingers in the puddle and smell it. Looks like your fuel line at the pump (on top of the fuel tank) has rotted out or cracked. If it stops leaking after you shut it off for a while, that confirms it.