Alternator - DELCO W/Integral Regulator: Identification

Alternators in production include 12SI, and 17SI series and CS-130 series, with integral regulators. Rated ampere output is stamped on housing. Alternators for Chevrolet and GMC are available in 66, 78, 94 and 120-ampere ratings for SI series. CS series alternators are available in 85, 100 and 105-ampere ratings. Jeep models are rated at 42, 56, 66, 78 and 80 amperes.