GM Parts Club
The three-character codes that decide which part fits your specific vehicle.
What an RPO Is
A three-character Regular Production Option code. Each one describes something the factory installed.
The Ones That Change Parts
Suspension packages, axle ratios, brake packages, tow packages, seat content, roof content and emissions equipment.
How to Use Them
Read them off the SPID label and send them along with the VIN. It removes guesswork entirely.
Ordering is easiest if you have the VIN in front of you. Head to our Buick OEM parts catalog to shop by vehicle, or search for GM parts to go straight to a part.
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