Differential cover is finned aluminum and made from 356 aluminum alloy, heat treated to a T-6 condition for strength and durability. They are not only attractive they have larger oil capacity and offer better heat dissipation from the aluminum fin design. Mounting hardware and drain plug(s) (where applicable) are included. Note: Before ordering please be sure this is for your application, please view and compare chrome cover below with your existing cover before ordering. GM has manufactured many 10 bolt axles be sure of your application before ordering.
Fits:

1500, Tahoe, Yukon, Suburban 1988-1999 W/8.5 Ring Gear