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Rear axle identification information is stamped on the right side axle tube near the differential housing. The information includes the following:

1. Broadcast code (1)
2. Build Source (2)
3. Build date (3) (Julian date)
4. Shift built (4)

Fig 1: Rear Axle Identification Stamp

Courtesy of GENERAL MOTORS CORP.

In order to verify reports made on the rear axle assembly, include full code letters and build date numbers.