Photo 1 of A-Premium Alternator Compatible with Chevy Silverado 2500 3500 HD Classic & GMC Sierra 2500 3500, 2006 2007 V8 6.6L, 12V 145Amp Clockwise 6-Groove Clutch Pulley, Replace# 15845337, 15845338

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Photo 1 of A-Premium Alternator Compatible with Chevy Silverado 2500 3500 HD Classic & GMC Sierra 2500 3500, 2006 2007 V8 6.6L, 12V 145Amp Clockwise 6-Groove Clutch Pulley, Replace# 15845337, 15845338Photo 2 of A-Premium Alternator Compatible with Chevy Silverado 2500 3500 HD Classic & GMC Sierra 2500 3500, 2006 2007 V8 6.6L, 12V 145Amp Clockwise 6-Groove Clutch Pulley, Replace# 15845337, 15845338