42 service parts identification sticker decoder
GM RPO code lookup and decoder - Class B Forums GM RPO code lookup and decoder - Class B Forums Thread Tools Display Modes « Roadtrek 190 Popular and carrying a motorcycle | Narrow roads and vehicle choice... » Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off GM RPO Codes - Axle & Ratio Identification - Sierra Gear GM RPO Codes, or General Motors "Regular Production Option" codes contain lots of valuable information about your GM vehicle. Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled "Service Parts Identification" inside the drivers door panel or glove box.
The Service Parts Identification Label | Chevy SSR Forum The label lists both Regular Production Option (RPO) and Regular Production Accessory (RPA) codes, identical to what can be found on your truc...