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Dorman 502-551 Diesel Fuel Injector Pump
| Brand | Dorman 502-551 |
|---|---|
| Connector Gender | Female |
| Connector Quantity | 1 |
| Gasket Or Seal Included | Yes |
| Mounting Hardware Included | No |
| Package Contents | 1 Pump |
| Port Quantity | 3 |
| Pump Type | Mechanical |
| Terminal Gender | Male |
| Terminal Quantity | 2 |
| Terminal Type | Blade |
| Wire Quantity | 0 |
| Wiring Harness Included | No |
| Fits | Chevrolet and GMC · 16 vehicles |
Thoroughly remanufactured. Critical components are replaced and clearances are verified after testing.
Mechanical pump. Built for dependable diesel fuel injection performance.
Seal included. Helps simplify installation and reduce leak points.
Cross-references GB 739-103, Standard Ignition IP22 and 97208073 for the same application. See all 5.
Dorman 502-551 Diesel Fuel Injector Pump
This Dorman diesel fuel injector pump is remanufactured for reliable fuel delivery in diesel applications. It is a mechanical pump with a female connector, blade terminals, and an included gasket or seal for service replacement on select Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 models.
Key Features
- Remanufactured using a controlled process for consistent quality and reliability
- Critical internal components are replaced during rebuilding
- Clearances are verified after cleaning, reassembly, and testing
- Mechanical pump design for diesel fuel injection service
- Includes gasket or seal for installation sealing
- Female connector with 2 male terminals, blade terminal type
Detailed Description
The Dorman 502-551 diesel fuel injection pump is built for direct replacement service on 2001-2004 Chevrolet Silverado 2500 HD, 2001-2004 Chevrolet Silverado 3500, 2001-2004 GMC Sierra 2500 HD, and 2001-2004 GMC Sierra 3500 applications. This remanufactured pump is processed to restore operating condition by replacing critical wear components and checking internal clearances after assembly and testing. For buyers searching for a 2001-2004 Chevrolet Silverado 2500 HD diesel fuel injector pump or a 2001-2004 GMC Sierra 3500 fuel injection pump, Part Number 502-551 provides a service-ready replacement option.
This part cross-references Standard Ignition (e.g., IP22) for the same application.
Common Problems This Part Can Address
- Hard starting caused by fuel delivery loss at the injection pump
- Rough idle related to inconsistent diesel fuel pressure or metering
- Engine hesitation during acceleration from pump wear
- Fuel system performance issues tied to internal pump clearances
- Replacement needs after pump leakage or mechanical failure
Installation Notes and Tips
Verify connector style, terminal count, and port layout before installation. Inspect the sealing surfaces and replace any damaged lines or related components during service. Confirm vehicle fitment by year, make, and model before ordering, especially on Silverado 2500 HD, Silverado 3500, Sierra 2500 HD, and Sierra 3500 diesel applications. Part Number 502-551 uses a mechanical pump design and does not include mounting hardware or a wiring harness.
Quality Assurance
Dorman remanufactures this pump through a controlled process that includes component replacement, cleaning, reassembly, and testing to help restore dependable operation. The pump is supplied with an included gasket or seal for service installation.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2004 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | — |
| 2004 | Chevrolet | Silverado 3500 | 6.6L | V8 | N/A | — |
| 2004 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | — |
| 2004 | GMC | Sierra 3500 | 6.6L | V8 | N/A | — |
| 2003 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | — |
| 2003 | Chevrolet | Silverado 3500 | 6.6L | V8 | N/A | — |
| 2003 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | — |
| 2003 | GMC | Sierra 3500 | 6.6L | V8 | N/A | — |
| 2002 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | — |
| 2002 | Chevrolet | Silverado 3500 | 6.6L | V8 | N/A | — |
| 2002 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | — |
| 2002 | GMC | Sierra 3500 | 6.6L | V8 | N/A | — |
| 2001 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | — |
| 2001 | Chevrolet | Silverado 3500 | 6.6L | V8 | N/A | — |
| 2001 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | — |
| 2001 | GMC | Sierra 3500 | 6.6L | V8 | N/A | — |
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