Bosch AL8785X Alternator

Reliable Bosch Remanufactured Alternator for GM Vehicles

The Bosch AL8785X Alternator (Remanufactured) is designed to provide dependable electrical charging performance for a range of General Motors trucks and SUVs. Engineered to meet OEM specifications, this 12-volt alternator supports models such as the Chevrolet Silverado, GMC Sierra, and Cadillac Escalade.

• 12-volt electrical system compatibility
• 105 ampere output for consistent power delivery
• Internal fan type with included external fan for optimal cooling
• Clockwise rotation direction with 6-groove pulley included
• Aluminum case construction for durability and heat dissipation
• Internal voltage regulator and external regulator included
• Plug type 314 with 4-pin rear view main mounting ear at 6 o'clock

About the Bosch Alternator (Remanufactured) Product Line

The Bosch Alternator (Remanufactured) line offers high-quality remanufactured alternators that meet strict OEM standards. Each unit undergoes comprehensive testing and refurbishment to ensure reliable performance and longevity. This product line is tailored for professional repair and replacement needs, providing a cost-effective alternative to new alternators without compromising on quality.

Detailed Product Description

The AL8785X alternator features a robust aluminum case that enhances heat dissipation and structural integrity. It includes a 6-groove pulley with a 57 mm outside diameter, designed for compatibility with serpentine belt systems common in GM trucks and SUVs. The internal fan works in conjunction with the included external fan to maintain optimal operating temperatures during heavy electrical loads. The alternator’s internal voltage regulator ensures stable voltage output, while the external regulator provides additional control. This unit is not one-wire capable, requiring proper wiring connections for installation.

Compatible Vehicles and Common Applications

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

Common Issues This Alternator Addresses

• Battery not charging or low voltage output
• Intermittent electrical failures or dimming lights
• Excessive alternator noise due to worn bearings
• Failure of internal voltage regulator causing electrical system instability
• Overheating issues from inadequate cooling fans

Installation Notes and Tips

• Ensure vehicle battery is disconnected before installation
• Verify plug type 314 and 4-pin rear mounting ear alignment
• Check belt condition and tension on the 6-groove pulley
• Confirm clockwise rotation direction matches vehicle requirements
• Test alternator output voltage after installation to ensure proper function

Quality Assurance and Warranty

This Bosch AL8785X remanufactured alternator is built to meet or exceed OEM standards. Each unit undergoes rigorous testing to verify electrical output, mechanical integrity, and regulator performance. The aluminum case and included cooling fans contribute to long service life. Warranty coverage details should be confirmed with the distributor or installer.