Dorman 594-565 Engine Harmonic Balancer

Engine Harmonic Balancer for GM V8 Applications

Dorman 594-565 is a direct replacement engine harmonic balancer built to restore proper vibration control in select Chevrolet and GMC applications. It uses a stress-resistant rubber bond to absorb engine vibration, while ductile steel construction adds tensile and impact strength for long-term durability.

Compatible With 2006-2010 Chevrolet Express 2500, 2006-2010 Chevrolet Express 3500, 2006-2010 Chevrolet Silverado 2500 HD, 2007-2010 Chevrolet Silverado 3500 HD, 2006-2010 GMC Savana 2500, 2006-2010 GMC Savana 3500, 2006-2010 GMC Sierra 2500 HD, and 2007-2010 GMC Sierra 3500 HD. This Dorman 594-565 harmonic balancer also cross-references PowerBond by Dayco PB1649N for the same application.

• Direct replacement harmonic balancer for engine vibration control
• Stress-resistant rubber bond helps absorb torsional vibration
• Ductile steel construction for added strength and durability
• 6-groove pulley design for serpentine belt systems
• Black finish with degree markings for timing reference
• Keyway included for proper crankshaft indexing
• Inside diameter: 49.8 mm
• Outside diameter: 197 mm
• Depth: 39.5 mm

Detailed Product Overview

This harmonic balancer is engineered for GM truck and van engines that require stable crankshaft vibration damping and accurate accessory drive alignment. The 6-groove serpentine pulley profile, 197 mm outside diameter, and degree markings make it a practical OE-style replacement for service work on Chevrolet Silverado 2500 HD, Chevrolet Express 3500, and related GMC Sierra and Savana models. Dorman 594-565 is also listed for classic applications including 1964 Chevrolet El Camino, 1966 Chevrolet Caprice, 2007 Chevrolet Silverado 2500 HD Classic, 2007 Chevrolet Silverado 3500 Classic, 2007 GMC Sierra 2500 HD Classic, and 2007 GMC Sierra 3500 Classic.

What It Helps Address

• Crankshaft vibration from a worn or deteriorated balancer
• Accessory belt wobble or pulley runout concerns
• Timing reference visibility issues from a faded balancer
• Noise or harshness caused by failed rubber isolation
• Replacement needs after balancer cracking or separation

Installation Notes and Tips

Verify crankshaft dimensions, pulley groove count, and keyway style before installation. Confirm the balancer matches the engine configuration and accessory drive layout for your Chevrolet Express, Silverado, GMC Savana, or Sierra application. Use the degree markings as a timing reference during setup, and inspect the serpentine belt system, crankshaft snout, and related front-end components before final assembly.

Quality Assurance

Dorman manufactures this harmonic balancer as a direct replacement part with materials selected for vibration control and durability. The ductile steel body and bonded rubber isolator are designed to meet the demands of everyday engine operation in GM truck and van platforms.