Look and see where it is leaking from.
No year, no make, no model, no engine size, therefore you will get no answer. But I can tell you it is located somewhere on the fuel system. May be in the fuel tank or somewhere along the fuel line. That is about all I can tell you with the information you provided.
As you did not list what model Buick you are referring to it is impossible to answer your question. All I can tell you is to follow the fuel line from the fuel tank to the engine and you will find the fuel filter.
pressure test line comming from fuel tank,one of two ways,1.disconect line from fuel filter on side where fuel line connects from fuel tank,if pressure 26psi to 35psi reconnect line to filter and check your line on other side of filter if pressure holds your fuel pump and fuel filter are ok,the other way is to disconnect inlet line from tank to fuel regulator and check your fuel pressure,the only thing with this method is if your fuel filter is clogging or clogged you will not get an accurate fuel psi.you can also check your fuel regulator,you fuses,or your relays to anything that has to do with your,depending on what type of car you have
fill tank, to top of neck, watch the leak area, [don,t start it]
Tell me what car the fuel tank is located in and I will tell you the fuel capacity.
They tell me it is in the fuel tank. Like another answer, drop the tank to get to it.
Smear washing up liquid over where you suspect there is a leak will start bubbling and prove if there is a leak or not.
AnswerI am a licenced technician, and it all depends on what section of line is leaking, if the lines are steel or plastic, and what the rest of them look like. If a steel fuel line is leaking because it's rusted out, (eg. eastern Canada, northeastern US), chances are that large sections of new line will need to be spliced in; in extreme cases, new line will need to be run from the engine all the way back to the fuel tank. In the case of plastic fuel line, if the line is simply cut or split, it can sometimes be repaired with purpose-built fittings; if not, the complete section of line needs to be replaced. Many vehicles have different size fuel lines; General Motors vehicles, for example, usually run 3/8" line to the engine, 5/16" line for return to the fuel tank, and 1/4" for vapour return. It all depends on the vehicle; if the lines are damaged so badly that a technician can't tell which one is leaking, then they must all be replaced. It does no good to patch a bad section, only to disturb the other ones so they start to leak. I wouldn't recommend fuel lines as a do-it-yourself project.
The fuel gauge is located in cars. It is used to tell how much fuel is left in the tank. When this gets low the tank will need filling up with more fuel.
One is for the fill line to put gas in, the other is probab;y for the sensor to tell how mush gas is in the tank.
Sorry to be the 1 to tell you this, but it is inside of the fuel tank. GM. took it out of the frame rail in 2004 and moved it to the fuel tank.
Where is the leak at? Is it under or near the engine? If so it may be the fuel filter. It may need tightening or need a new seal. If it is at the gas tank there are sealant kits where you mix two types of paste together and put it over the hole. Depending on where you live (near salt water) and the age of the truck it could be that your tank is rusted out and finding a good used one is the best bet. In between the tank and the engine is a fuel line that runs along the frame and sometimes there is a fuel filter there somewhere. Check it and any rubber hoses or loose hose clamps. Without knowing where it is though its hard to tell how to fix it.