How about cast iron front differential? I like the Envoy center console also with the pop out drink holder. The early second generation floor cable shifted transfer case is another item I like, no more vacuum leaks! I also like the extendable double visors like the ZR2 uses, and they've got lights also.

 

Dash pad
Upper map lights and switches
Right rear door
Front door interior panels
hood
rims

 

Those are not exclusive to the ZR2. My 04 non ZR2 came with them. Finding ones that the lighted mirror cover isn't broken on however, that can be a difficult task...

 

2000 trailblazer interior
Zr2 rear axle
Bravada front axle setup
On star cover for rear panel
Zq8 rims
Double din dash piece

 

And my 99 came with the extended visors. Might just be an interior upgrade option

 

My 95 has the visor extensions, the lighted vanity mirror, and a set of smaller bonus visors behind the main ones

 

I forgot to mention those little things!!

 

Didn't they also make a monochromatic rear view mirror for the "S" series that automatically dims it when you have bright head lights behind you? I think that option was also part of the outside mirrors doing it also. And, if memory serves me the outside mirrors on Envoys had power folding mirrors on them. Some people like the third brake light (neon) on the rear window of the Envoys also.

 

The biggest problem I've seen with the visors with the extendable piece is the material on them comes loose over time. The vanity light/mirror covers can be fixed or replaced.

 

Jimmy Diamond Edition seats!!!

I found one being parted out in Sioux Falls, South Dakota...about a 3.5 hour drive strait north (pre Missouri River flood).
Saw the ad late at night, past 10, so I waited til the next day to contact. Already sold the front seats....

I would also like some Jimmy Envoy rear bumper side moldings in black.