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SPID or RPO Code List

09-06-2012, 09:12 AM
I need to decipher the SPID code list for a 1987 Buick LeSabre. Specifically, I need the axel ratio. I am not having ANY luck with internet searches. Help???

09-06-2012, 03:13 PM
Google for 87 GM rpo codes.

Blue Bowtie
09-06-2012, 09:48 PM
This is through October 1992:


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