Not exactly Lang, they will interchange and look similar but are not identical. From memory the Chev is 12 ft/lbs torque and the GMC (CCKW) 14 ft/lbs. 
 You can pick the difference between the two by the GMC having an oiler or some such fitting for the bushing on the coned end. 
 
Dave
		 
		
		
		
		
		
		
			
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				Hell no! I'm not that old!
			 
		
		
		
		
		
	
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