I am going to look at a car and on the back were it would normally say RS LS or GSR there is nothing. I know the car has leather seats and a power sunroof. I know you can obviously tell from the engine but the car might have a swap.
Thanks for the help

This is the car here:http://seattle.craigslist.org/sno/car/486729296.html

Dont forget LS, SE and Type-R.

Well this is very easy to tell.

1st of all, RS, LS, SE, GS all come with the same B18B1 NON-VTEC motor, 142hp @ 7000RPM.
The GS-R comes with a B18C1 DOHC VTEC motor, 170hp @ 8000RPM.
The Type-R comes with a B18C5 DOHC VTEC, 195hp @ 8200RPM.

Aside from the rims, tires, motors etc..

You can tell by the VIN # if the 6th number in the VIN is a 4, its an RS, LS, SE, GS, 4 means that its a non-VTEC.

2 - GS-R/Type-R DOHC VTEC

7 - LS, GS sedan. Non-VTEC

8- GS-R sedan. DOHC VTEC

Now to tell the difference, besides motors, RS is the base model, and doesn't come color matched. (side and mirrors are black) also, the RS doesn't come with a moon roof, cruise control, nothing is power (manual locks, manual windows etc) this is basically the stripped down model, or the type-r shell.

The LS is what most people prefer because it offers a little luxury and not so obsolete. The LS is "Luxury Sport" and everything is powered. Some comes with a moonroof. Also the LS has cruise control, and well...the preferred one.

The SE, is the same as the LS, and it's a GS model now. The SE again, teh same as an LS and comes with a badge on the rear hatch that says special edition. It also has the wording special edition somewehre in the interior.

The GS is grand sport and its the exact same as an LS and SE, except the GS comes with leather stock and a rear spoiler.

GS-R is completely different, it has cloth or leather, a power sun/moon roof, power everything, the DOHC VTEC engine, only a 5 speed manual, and comes with a badge in the rear hatch that says DOHC VTEC.

Type-R is the highest of them all, and the most rare. Type-R has the B18C5, and the 5 lug conversion. Has same features as an RS, but more powerful and light.

Thats about all you need to know about the trims, because my fingers are tired from typing all this. LOL. Well yea..Hope you find out. =D

you can also tell by the badge on the car door and under the license plate...