23 GMC SIERRA 2500 REAR AXLE RING GEAR AND PINION 3.42 RATIO GU6 G80
3.42,GU6,G80 NO WARRANTY ON BEARINGS. SIERRA 2500 PICKUP 20 rear, 3.42 ratio. SIERRA 2500 PICKUP 22-24 rear, 3.42 ratio. SIERRA DENALI 2500 20-24 rear, 3.42 ratio. SILVERADO 2500 PICKUP 20 rear, 3.42 ratio.