WAI 8489N Alternator

WAI 8489N Alternator for Delco 145 Amp Applications

The WAI 8489N is a 100% new alternator built for vehicles that need reliable charging output and stable electrical performance. It is engineered for Delco 145 amp applications and is a direct-fit option for select 2006-2007 Chevrolet Silverado HD and GMC Sierra HD trucks.

Key Features

• 145 amp amperage rating for charging-system demand
• 100% new unit, not remanufactured
• Internal fan design
• Internal voltage regulator
• Clockwise (right) rotation
• 6-groove serpentine pulley included
• Decoupled clutch pulley included
• DELCO family alternator

Product Details

Built by WAI, part number 8489N is engineered to deliver the amp output needed for modern vehicle electrical loads. This alternator uses proprietary components and manufacturing processes to support long service life and consistent performance. It is a Delco-style 145 amp unit with an internal regulator, internal fan, and included pulley configuration for the specified applications. This part cross-references BBB Industries 8489 for the same application.

Vehicle Fitment

• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A, Delco 145 Amp, Exc. Dual Alternator
• Fits 2007 Chevrolet Silverado 3500 HD, N/A, Delco 145 Amp, Exc. Dual Alternator
• Fits 2007 GMC Sierra 2500 HD Classic, N/A, Delco 145 Amp, Exc. Dual Alternator
• Fits 2007 GMC Sierra 3500 HD, N/A, Delco 145 Amp, Exc. Dual Alternator
• Fits 2006 Chevrolet Silverado 2500 HD, N/A, Delco 145 Amp
• Fits 2006 Chevrolet Silverado 3500, N/A, With Delco 145 Amp 6S Cllutch Pulley
• Fits 2006 GMC Sierra 2500 HD, N/A, Delco 145 Amp
• Fits 2006 GMC Sierra 3500, N/A, Delco 145 Amp

Common Replacement Reasons

• Battery warning light or charging-system fault
• Low output from a worn alternator
• Dim lights or unstable electrical performance
• Noise from a failing pulley or internal alternator component
• Replacement for Delco 145 amp Silverado HD and Sierra HD applications

Installation Notes

Verify the vehicle’s original alternator specifications before installation, including amperage rating, pulley style, rotation direction, and whether the truck uses a dual-alternator setup. Confirm the application notes for 2006 Chevrolet Silverado 3500 with Delco 145 amp 6S clutch pulley and for 2007 HD Classic/HD models marked exc. dual alternator. Match the connector and mounting configuration to the original unit before final installation.

Quality Assurance

WAI states that this alternator is 100% new and built with proprietary components and processes to support maximum life and performance. The 8489N is manufactured for consistent charging output in the specified Chevrolet Silverado HD and GMC Sierra HD applications.