Jaylec Alternator for 12V 145A 99-01 CHEV TRUCK WITH VORTEC ENGINE 65-0019Increased electrical power output: A JL series alternator from Jaylec has a higher maximum power output than a factory alternator, which means it can better handle the electrical demands of aftermarket accessories and systems, such as high end audio, lighting, and navigation systems. Improved efficiency: Jaylec alternators are designed to operate at a higher efficiency than factory alternators, which can help to reduce fuel consumption and increase