1967-1969 GMC K15 L6 3.8L 12si High Output Alternator

Fitment: This is a direct fit high-output alternator for the 1967-1969 GMC K15 3.8L. 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 different voltage regulators that you will need to purchase with the alternator for it to be installed. View our Regulator Options Here. Pulley: This alternator also comes with a smaller pulley, which causes it to spin faster than a larger pulley. This can help the alternator produce its maximum output. With a smaller pulley, it is required to install a 1/2" - 1" shorter belt. See this Blog Article for assistance in finding the correct shorter belt. Big 3 Wiring: When Upgrading to a High-Output Alternator, it is required to upgrade your wi