1988-1991 GMC R2500 Suburban 7.4L 12SI and CS144 High Output Alternators

JS Alternators

1989-1991 GMC R2500 Suburban 7.4L cs144 250-320-370-400amp High Output Alternator

JS Alternators

1988-1989 GMC R2500 Suburban 7.4L 12si 250-320amp High Output Alternator