Look in glove compartment at option list, it should start with a K
K09 Alternator, 140 amps
K60 Alternator, 100 amps
K62 Alternator, 105 amps
K65 Alternator, dual, 105 amps each
K68 Generator, 105 AMP
K76 Alternator, dual, 125 amps each
K99 Alternator, 85 amps
KD9 Alternator, dual, 145 amps each
KG3 Alternator, 145 amps
KG4 Alternator, 150 amps
KG7 Alternator, 125 amps
KG8 Generator 130 Amp
KG9 Generator, 140 Amp
KW1 Alternator, 160 amps
KW2 Generator, 124 Amp
KW5 Alternator, 220 amps
KW7 Alternator, 170 amps
KW8 Alternator, 155 amps
KXB Dual Generator, 100 Amp
KXB Alternator - Dual 100 AMP
KY1 Generator, Hybrid motor
hope this helps...