My 88 Buick LeSabre T-Type has the WE2 option code. So WE2 wasn't only used to identify a GN. It was a general code for a particular set of options.
The LeSabre T-Type Option
Option Code WE2 – (Includes Y56 – Grand Touring Package) $1,958 for 1988
Special 15” Aluminum Wheels
P215/65R15 Eagle Blackwall Tires
Heavy Duty Engine and Transmission Cooling
Grand Touring Suspension
2.97 Final Drive Ratio
Leather Wrapped Sport Steering Wheel and Shift Handle
Tilt Steering Column
Two-Speed Wipers and Delay Feature
Electronic Cruise Control
Red and Amber Tail Lamps
Dual Exhaust Outlets
Black Body-Side Belt Reveal, Roof Drip and Wheel Opening Molding Treatment
Lay Down Hood Ornament
Black Cloth 45/45 Seats – Trim Code 583
(1987 Had Black/White Grand National Seating)
Black Front Carper Savers
(1987’s Had All Red Power Six Emblems on Carpet Savers)
T-Type Identification
Blackout Trim Tail Lamps, Door Handles, Lock Cylinders and Grille
Rear Deck Lid Spoiler (Doubtful That Any 1987’s Were Delivered With Rear Spoiler)
Front Air Dam
ETR AM-FM Stereo Radio With Graphic Equalizer, Cassette Tape and Red Backlighting
Operating Console with Red Backlighting
Blacked-Out Function Controls (i.e. Heating, Air Conditioning and Steering Column)
Analog Gauge Cluster with Red Backlighting
(Includes: Voltmeter, Oil, Tachometer and Temperature Gage, and Trip Odometer
Available in Exterior Paint Codes:
13 – Sterling Silver Clearcoat
40 – Artic White Clearcoat
41 – Black Clearcoat
72 – Ruby Red Clearcoat