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Dorman 594-566 Engine Harmonic Balancer
| Brand | Dorman 594-566 |
|---|---|
| Bolt And Washer Included | No |
| Center Bolt Included | No |
| Color/Finish | Black |
| Degree Markings | No |
| Depth | 147.5 |
| Drive Belt Type | Serpentine |
| Grade Type | Regular |
| Inside Diameter | 40.6 |
| Keyway Type | No |
| Mounting Hole Diameter | 59.2 |
| Mounting Hole Quantity | 1 |
| Outside Diameter | 198 |
| Package Contents | 1 Harmonic Balancer |
| Pulley Groove Quantity | 6 |
| Fits | Chevrolet and GMC · 4 vehicles |
Direct replacement. Fits as a direct replacement harmonic balancer.
Stress-resistant rubber bond. Helps absorb engine vibration for smoother operation.
Ductile steel construction. Adds tensile and impact strength for greater durability.
Cross-references 12555140 for the same application. See all 1.
Dorman 594-566 Harmonic Balancer
This Dorman harmonic balancer is a direct replacement for select Chevrolet Express 3500 and GMC Savana 3500 applications. Built with a stress-resistant rubber bond and ductile steel construction, it helps absorb engine vibration while supporting long-term durability in demanding service.
Key Features
- Direct replacement harmonic balancer for OE-style fitment
- Stress-resistant rubber bond helps isolate engine vibration
- Ductile steel construction adds tensile and impact strength
- 6-groove pulley design for serpentine belt systems
- Black finish with a regular grade type
- Part number 594-566 for easy identification
Detailed Description
Dorman 594-566 is engineered for engines that rely on a harmonic balancer to reduce torsional vibration at the crankshaft. Its 198 mm outside diameter, 147.5 mm depth, and 40.6 mm inside diameter reflect a direct replacement design intended to match the original component’s form and function. This part cross-references OE number 12555140 for the same application. For buyers searching for a harmonic balancer for 2001-2002 Chevrolet Express 3500 or a replacement harmonic balancer for 2001-2002 GMC Savana 3500, this part number 594-566 provides a fitment-specific option.
What It Helps Address
- Engine vibration felt through the crankshaft and accessory drive
- Wear or deterioration of the original rubber bond
- Crankshaft damping concerns on serpentine-belt engines
- Replacement needs for a damaged or out-of-balance balancer
- Service issues tied to a worn OE harmonic balancer
Installation Notes and Tips
Verify pulley groove count, mounting dimensions, and belt routing before installation. This balancer uses a serpentine drive belt layout and does not include a center bolt, washer, or degree markings. Confirm the crankshaft and mounting surfaces are clean and inspect the accessory drive system for wear before final assembly. Fits 2001-2002 Chevrolet Express 3500, N/A. Fits 2001-2002 GMC Savana 3500, N/A.
Quality Assurance
Dorman manufactures this replacement harmonic balancer with ductile steel construction and a vibration-absorbing rubber bond to support dependable service in OE-style applications. Part number 594-566 is built to match the listed fitment and dimensional requirements for the specified vehicles.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2002 | Chevrolet | Express 3500 | 8.1L | V8 | N/A | — |
| 2002 | GMC | Savana 3500 | 8.1L | V8 | N/A | — |
| 2001 | Chevrolet | Express 3500 | 8.1L | V8 | N/A | — |
| 2001 | GMC | Savana 3500 | 8.1L | V8 | N/A | — |
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