Chevrolet Impala SS Handbook page 52

5. Now get under the car and disconnect the retainer
for the fuel supply/return and evaporation lines. It's
directly above the rear end.
6. To fully remove the tank and then remove the fuel
sender assembly. You will need to have a fuel line
disconnect tool for this.
7. With the tank lowered a bit you have easier access
to the fuel supply and return lines. Move the
rubber boot out the way and you'll see the QD. Use
the disconnect tools. Select the appropriately sized
one and with the sleeve facing up into the
connection push it in. You might have to push the
line a little to get it in. It should slide in and then
pull the lines apart. If it's taking a lot of effort, stop
you're not fully disengaging the quick disconnect.
52
Maintenance: Fuel System
Evaporation lines.
Fuel line disconnect tool.
Fuel line covers.
SSHandbook