Yes, by 87 the front seats were "partial leather" as standard. This means just the "seating surfaces" were leather. The side panels and back panel was vinyl.
In the standard '87, the only things that were leather were the partial leather front seats, the shift knob and boot, and the steering wheel.
Here's a pic of the panels and pulls from a lipstick red full leather car. You can see the stitching on the door pull and the tops of the storage compartments.
