Another idea if aren't aware of. In the factory service manual in the General Information section, is the " Options and Process codes". All the RPO codes available for that year truck. Or if it's your Buick GN service manual options available that year.
So being the total GM RPO list is gigantic the service manual narrows it down to only what was available on that type series of vehicle. And i have photos, from my 1993 GMC manual.
So being the total GM RPO list is gigantic the service manual narrows it down to only what was available on that type series of vehicle. And i have photos, from my 1993 GMC manual.
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