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A direct-fit high-output alternator for 1991-1995 GMC C1500 trucks with the 5.7L V8. It uses a GM-style internal regulator set at 14.8 volts with a single-wire connection, so it is not plug-and-play and must be wired in. A smaller pulley spins the alternator faster for maximum output, which means you need a belt 1/2 to 1 inch shorter. It suits owners running extra electrical load, such as audio, winches or work lighting, who can handle the wiring and belt change; stock-output replacements stay simpler for a truck left as it came.
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This is a direct fit high-output alternator for the 1991-1995 GMC C1500 with the 5.7L V8 engine. It installs in the stock alternator location.
It has a 14.8 Volt GM-style internal regulator with a one-wire connection. It is not plug-and-play and must be wired using the one-wire connection. Other voltage regulators are available separately for a specific charging voltage setpoint, and one must be purchased with the alternator for installation.
It comes with a smaller pulley, which makes the alternator spin faster than a larger pulley would. This can help it produce its maximum output. The smaller pulley requires a belt that is 1/2" to 1" shorter.
