GM CS130 Alternator - 140 Amp 6-Groove Pulley

The GM CS130 Alternator – 140 Amp 6-Groove Pulley by POWERMASTER is a high-output OEM-style charging system designed for General Motors vehicles requiring robust electrical generation. Built for drivers who demand reliable power delivery in stock or modified applications, this alternator replaces worn or undersized charging units with a direct-fit solution engineered to maintain battery voltage under heavy electrical loads. Whether you're running factory electronics or have added aftermarket accessories, this 140-amp unit ensures consistent power availability for engine management systems, lights, and auxiliary components.

The CS130 alternator features a robust aluminum case with black paint finish, rated for 140 amps at 12V/16V operation. The 6-groove serpentine pulley design ensures reliable belt grip and efficient power transmission without slipping under sustained load. This one-wire configuration simplifies installation by eliminating complex multi-wire harnesses—the single wire connects directly to the battery, reducing wiring complexity and potential failure points. The straight-mount bracket design accommodates OEM mounting locations, allowing drop-in fitment on compatible GM platforms without modification to engine bay components or accessory brackets.

Technicians and enthusiasts benefit from this alternator's plug-and-play compatibility with a wide range of General Motors engines and model years. The 140-amp output excels in applications where factory 100-amp or 110-amp units fall short—including vehicles with upgraded fuel injectors, electric cooling fans, or high-draw ignition systems. Installation requires only basic hand tools and takes approximately one hour. The compact footprint (7.7 x 7.35 x 9.4 inches) and manageable weight of 12.08 pounds make handling and positioning straightforward during replacement, and the aluminum construction resists corrosion for extended service life in demanding climates.