Buy OEM Buick Part # 12479329 (12471283). Differential Ring and Pinion. All Models; 1/2 Ton; 3.73 Ratio; w/Crew Cab. All Models; 1/2 Ton; 3.73 Ratio; w/Crew Cab; 9.25 Ring Gear. All

Gear. Pinion. Ring.
A differential Ring Gear and Pinion. AND.

Differential Ring and Pinion

All Models; 1/2 Ton; 3.73 Ratio; w/Crew Cab. All Models; 1/2 Ton; 3.73 Ratio; w/Crew Cab; 9.25 Ring Gear. All Models; 3/4, 1 Ton; 3.73 Ratio. All; Over 7500 GVW. Silverado, Sierra; 2500, 3500 Series; 3.73 Ratio. Yukon XL, Suburban; 6.0L. Yukon XL, Suburban; 6.0L; 3.73 Ratio.