To any GM Parts guy that can help me figure some stuff out there.

Im trying to positively I.D. what and IF there is any difference between these two models of the same car.

Choose a 2012 Chevy Cruze ECO with 6-speed manual

AND

Compare it to a 2012 Chevy Cruze LTZ with 6-speed auto.

Im trying to figure out what fuel system components are different, I.E. is the fuel tank the same part #?

-Fuel Tank
-Sending unit
-Fuel Filler neck
-Fuel Filler Hose/tube
-Evap vent connection tube
-Wiring Harness for sending unit?

Ultimately people are finding the Cruze ECO with the m6 has been rated to 12.6 gallons to FULL, BUT if they dick with it, it can be filled with nearly 15.5 gallons like the regular Cruze. So im trying to I.D. what is different that might be able to be swapped out to extend the fuel range of the ECO beyond 500 miles per tank.

Thanks!