James, there are two Bosch possibilities: (a) 105 amp = 4 pin, and (b) 160 amp = 2 pin, but this 2 pin, 160 amp Bosch, is used on the 4.8 engine, I wish he told me how many pins? My software indicates the 4.8 and 5.3 engines use the 2 pin regulator, while the ... Login to read more.