Dayco PB1649N Engine Harmonic Balancer

Dayco PB1649N Harmonic Balancer

The Dayco PB1649N is a premium OEM replacement harmonic balancer for select Chevrolet and GMC trucks and vans. Built with a hub-weighted counterbalance and a cast iron outer ring, it supports smooth crankshaft operation and reliable accessory drive performance.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Hub weighted counterweight balance for proper crankshaft damping
• Cast iron outer ring for durable engine service
• Integrated 6-groove serpentine pulley
• Overall outside diameter: 198 mm (7.796 in.)
• Overall width: 62.35 mm (2.455 in.)
• Crank bore: 49.01 mm (1.930 in.)

Detailed Description

Dayco PB1649N is an engine harmonic balancer engineered for applications that use a serpentine accessory drive. It features one integrated pulley with 6 grooves, a 192 mm (7.560 in.) pulley outside diameter, and a cast iron outer ring for stable operation under engine vibration. The hub-weighted balance design supports proper crankshaft damping, while the 49.01 mm crank bore helps ensure correct fitment on the specified Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications. The Dayco PB1649N is also listed for Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, and GMC Savana 3500 models in the same year range.

Vehicle Fitment

• Fits 2006-2010 Chevrolet Express 2500, N/A
• Fits 2006-2010 Chevrolet Express 3500, N/A
• Fits 2006-2010 Chevrolet Silverado 2500 HD, N/A
• Fits 2007-2010 Chevrolet Silverado 3500 HD, N/A
• Fits 2006-2010 GMC Savana 2500, N/A
• Fits 2006-2010 GMC Savana 3500, N/A
• Fits 2006-2010 GMC Sierra 2500 HD, N/A
• Fits 2007-2010 GMC Sierra 3500 HD, N/A
• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A
• Fits 2007 GMC Sierra 2500 HD Classic, N/A
• Fits 2007 GMC Sierra 3500 Classic, N/A
• Fits 2006 Chevrolet Silverado 3500, N/A
• Fits 2006 GMC Sierra 3500, N/A

Common Replacement Uses

• Restores harmonic damping when the original balancer is worn or damaged
• Addresses serpentine pulley wear or wobble at the crankshaft
• Replaces a cracked or deteriorated outer ring
• Helps correct vibration-related engine noise in the front accessory drive
• Supports proper belt tracking on compatible Chevrolet Silverado and GMC Sierra applications

Installation Notes

Verify crank bore, pulley groove count, and overall dimensions before installation. This balancer does not include hardware, timing marks, or a Woodruff key, and installation instructions are not included. Confirm the engine configuration and accessory drive layout on your Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, or other listed application before replacement.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct-fit service on listed applications, with specifications matched to the original engine balance and serpentine drive requirements. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.