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1x Square Ignition Coil fits: Chevrolet Avalanche 1500 V8 5.3L 2002-2006 Chevrolet Avalanche 2500 V8 8.1L 2003-2006 Note: For Models with square Ignition Coils only OEM: 12558693, 12570553, 3859078, 38590782, 90541062 (GM)