2003 GMC Sierra 1500 equipped with 6.0L V8 Gas OHV, 5.3L V8 Gas OHV, 5.3L V8 Flex OHV, 4.8L V8 Gas OHV, 4.3L V6 Gas OHV
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Rear
M20X1.5 **8.50/8.625 RING GEAR SAGINAW-AMERICAN AXLE**10 BOLT DIFF** 21MM LONG
2003 GMC Sierra 1500 equipped with 6.0L V8 Gas OHV, 5.3L V8 Gas OHV, 5.3L V8 Flex OHV, 4.8L V8 Gas OHV, 4.3L V6 Gas OHV
Rear
M20X1.5 **8.50/8.625 RING GEAR SAGINAW-AMERICAN AXLE**10 BOLT DIFF** 21MM LONG