Axle Identification - Rear: 8.6,9.5,10.5,11.5
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Rear axle identification information is stamped on the right side axle tube near the differential housing. The information includes the following:
- Broadcast code (1)
- Build Source (2)
- Build date (3) (Julian date)
- Shift built (4)
In order to verify reports made on the rear axle assembly, include full code letters and build date numbers.