As of the time of this post, the California Bureau of Automotive Repairs allows only for the following incomplete emission monitors. It appears your Chevy Silverado's catalyst monitor must be Complete or Ready status in order for your truck to pass the smog check inspection.
- 1996-1999 model year vehicles will be allowed one incomplete readiness/emission monitor
- 2000 and newer model year vehicles will need all emission monitors in READY or COMPLETE status, with the exception of the EVAP monitor. AN incomplete evaporative monitor will not cause a smog check failure. It will be the only monitor allowed to be incomplete on a 2000 & newer vehicle.
- 1998-2006 model year vehicles are required to have all monitors complete or ready.
- 2007 and newer model year vehicles are allowed only an incomplete exhaust after-treatment system monitor (e.g., particulate filter, NOx/SCR treatment, catalyst, etc.)