If the Diagnostic Connector box has a built-in led/Sw , you have Cal emmissions with CE lamp and N/59 module.... Just look at the 16 pin connector ..if it has a push sw. at pin 2 and a Led at pin 4 , you have a CE with N/59 module.. and if you don't , then you have Federal version and no CE or N/59 module.. no need to pull the dash apart.
....but regardless, you can still get codes from other modules with a code tool.
It also states Cal on the sticker under the hood.

What codes did he find?????????????????????

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A Dalton