Remy 21798 Alternator

Reliable Alternator for Cadillac, Chevrolet, and GMC Vehicles

The Remy Premium Remanufactured Alternator 21798 is designed to restore your vehicle's charging system with dependable performance. Engineered for select Cadillac, Chevrolet, and GMC models, this alternator ensures consistent 12-volt power delivery and efficient operation.

• Amperage Rating: 105 amps for stable electrical output
• Internal fan type for effective cooling
• Remanufactured to meet OE standards
• Includes pulley for straightforward installation
• Clockwise rotation direction compatible with specified vehicles
• Internal voltage regulator for precise voltage control
• OE Manufacturer: Delco/Delphi

About the Premium Remanufactured Product Line

The Premium Remanufactured line by Remy offers alternators that have been carefully rebuilt to meet original equipment specifications. This process includes thorough testing and replacement of worn components, ensuring reliable performance and longevity. The 21798 alternator benefits from this rigorous remanufacturing process, providing a cost-effective alternative to new units without compromising quality.

Product Details and Specifications

This 12-volt alternator delivers 105 amps of electrical current, suitable for vehicles requiring moderate power output. The internal fan design helps maintain optimal operating temperatures, reducing wear and extending service life. The included pulley and clockwise rotation direction match the original equipment setup, simplifying replacement on compatible models. An internal voltage regulator maintains consistent voltage levels, protecting your vehicle's electrical system.

Compatible Vehicles and Common Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Avalanche 2500, Silverado 1500, Silverado 2500, Silverado 3500, Suburban 1500, Suburban 2500, Tahoe
• GMC Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Yukon, Yukon XL 1500, Yukon XL 2500
• Chevrolet Astro, Express 1500, Express 2500, Express 3500, Safari, Savana 1500, Savana 2500, Savana 3500

Common Issues Addressed by This Alternator

• Battery not charging or frequent battery drain
• Dimming or flickering headlights and interior lights
• Electrical system warning lights on the dashboard
• Unusual noises from the alternator area
• Vehicle stalling or difficulty starting due to electrical failure

Installation Notes and Tips

Before installation, verify the part number 21798 matches your vehicle’s requirements. This alternator includes the pulley, which simplifies replacement without needing additional parts. Ensure the battery is disconnected prior to removal to prevent electrical shorts. Properly torque mounting bolts and reconnect all electrical connections securely. Testing the charging system after installation is recommended to confirm correct operation.

Quality Assurance and Warranty

Remy’s Premium Remanufactured alternators undergo comprehensive testing to meet or exceed original equipment standards. This alternator is built with quality components, including an internal voltage regulator and fan, to ensure reliable performance. Warranty coverage details should be confirmed with the distributor or installer, as terms may vary.