I'm in the process of ordering a new Silverado. It's a short box standard cab 4WD LT.

The Z60 HIGH PERFORMANCE CHASSIS EQUIPMENT option jumped out at me. That's the same RPO as the Silverado SS suspension. Anyone here in the know as to what it would comprise of on the GMT900? All the guide lists is rear monotube shock absorbers and 275/55R20 tires on 20" wheels.

 

Z60 NEW! Suspension Package, High-Performance, includes 36mm front stabilizer bar
1 - Not available with C*109*3 Models or (LU3) Vortec 4.3L MFI V8 engine or (LY2) Vortec 4.8L SFI V8 engine. Included and only available with (P58) 4 - 20" x 8.5" (50.8 cm x 21.6 cm) 5-spoke machined aluminum wheels.

Available on LT and LTZ.


EDIT: (Related):

P58

Wheels, 4 - 20" x 8.5" (50.8 cm x 21.6 cm) 5-spoke machined aluminum, includes (QSS) P275/55R20 touring blackwall tires, (Z60) High-performance suspension package and steel spare (spare wheel will not cosmetically match the other 4 wheels)