1989 GMC R3500 V8 7.4L High Output Alternator JS Alternators This is a direct fit

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This is a direct fit high-output alternator for the 1999-2004 Ford F-450 Super Duty 6

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1989 GMC R3500 V8 7.4L High Output Alternator JS Alternators This is a direct fitFitment: This is a direct fit high output alternator for the 1989 GMC R3500 7. 4L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high output alternator comes with a 14. 8 Volt GM Style Internal Regulator with one wire connection. This alternator is not plug and play and must be wired with the one wire connection. NOTE: If you require charging at a certain voltage setpoint, we offer a selection of