It's for a 1997 Chevy Cavalier. My dad and I took it to get inspected and the mechanic said all it needs is a leak fixed in the EVAP line to pass emissions inspection. My dad suggested we buy the Dorman Sending Unit Repair Line parts 800-229 and 800-230, as that piece is rusted out and he says that that's the source of the leak.

The first problem is that I couldn't clarify whether parts 800-229 or 800-230 are compatible with the Cavalier. I've checked every source selling those parts online and none of them definitively say one way or the other whether or not the part will be compatible with the Cavalier.

The second problem is that my dad is having difficulty accessing that piece to replace it, as there are a few other hoses/lines and wires directly underneath it. It's located in the area right behind the fuel filter and in front of the rear axle.

Any help appreciated!

Sounds like a phone call to the Gm dealership.