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Re: Need to find rear axle code
During the manufacturing process of the rear axle, there is a sheet metal tag attached to one of the cover bolts. The tag is approximately 5/8" wide and 3" long. It contains axle ratio, model, build date, etc. If the tag is missing, the RPO code can be found on a sticker attached to the glove box door. There is a thread in the Blazer forum that tells what each RPO code means. RPO codes on that sticker will tell every option on that particular vehicle. An RPO code is three characters in length.
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