LActrical 6 PHASE HIGH OUTPUT 250AMP ALTERNATOR FOR CHEVY CHEVROLET AVALANCHE AVALANCHE LS LT LTZ 5.3 5.3L V8 2005 05 2006 06 2007 07 2008 08 2009 09 2010 10 LActrical PREMIUM QUALITY REPLACEMENT DENSO STYLE 6 PHASE ALTERNATOR Highly efficient,This unit uses less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions 250AMP HIGH OUTPUT,2-PIN PLUG REGULATOR,COSTUME MADE 44MM,1.3" 6-GROOVE OD OVER DRIVE PULLEY