These are a pair of NEW TAKE OFF Factory GM left and right upper control arms. These were removed from my 2015 Silverado 2WD crew cab 5.3 short bed pickup with only 100 miles on it. They have been stored indoors in a sealed box since they were removed. The GM number is 25812725 and 25812726. These are the forged cast iron type of control arms. GM made 3 different types of upper arms. There was a stamped steel and welded together, (a cast forged steel type) and a cast aluminum type. Please check your vehicle to see which type your truck has.