ZR6 RPO code
The 2003 production year had 3 significant generations that i've been able to track 1) the first 55 trucks produced in the February/March timeframe of 2002. These can be identified by unique Onstar unit, smooth shiny outer plastic trim, and bright silver interior trim pieces. 2) from April to the VIN 15,500ish they abandoned the smooth plastic outer trim, and painted the interior trim to a darker grey metallic and updated the Onstar unit. 3) Somewhere in the 15,000 unit VIN sequence they transitioned to the 3rd variation which can easily be identified by the black driver airbag located in the steering wheel.
Is your exterior black plastic trim smooth?


