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DormanPart #: 645-659
Dorman 645-659 Wiring Harness Connector
98 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Cadillac, Chevrolet, Hummer, and GMC, Escalade ESV, Avalanche, Silverado 1500, Silverado 2500 HD, Silverado 1500 HD Classic, H2, Avalanche 1500, Avalanche 2500, Silverado 1500 HD, Silverado 3500, Suburban 1500, Suburban 2500, Tahoe, Sierra 1500, Sierra 1500 HD, Sierra 2500 HD, Sierra 3500, Yukon, Yukon XL 1500, Yukon XL 2500, Silverado 2500, Sierra 2500, and Escalade EXT
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Dorman 645-659 Wiring Harness Connector
Dorman 645-659 is a multi-purpose wiring harness connector for clean electrical repairs and accessory installations. It uses weatherproof terminals and a locking tab to support a secure quick-disconnect connection, with a tidy installed appearance.
- Multi-purpose wiring harness connector for electrical repair work
- Weatherproof terminals for exposed underbody and rear lamp locations
- Locking tab helps maintain a secure quick-disconnect connection
- Female blade terminal design with metal terminals
- 20-gauge wire specification
- Fits rear lamp wiring harness connector applications on select Chevrolet, GMC, Cadillac, and Hummer vehicles
Application Details
This Dorman 645-659 connector is used in rear lamp wiring harness repair and replacement work on select GM trucks and SUVs. It is a direct-fit solution for vehicles such as the 2007-2008 Chevrolet Silverado 1500, 2001-2005 GMC Sierra 2500 HD, and 2001-2005 Chevrolet Tahoe, with fitment also covering related Cadillac Escalade, Chevrolet Avalanche, Suburban, Yukon, and Hummer H2 applications. This part cross-references Standard Ignition S-1242 for the same application.
Common Repair Uses
- Broken or heat-damaged rear lamp connector
- Corroded terminals at the tail lamp harness
- Loose electrical connection at the rear lighting circuit
- Damaged pigtail during trailer or lighting service
- Intermittent rear lamp operation caused by connector wear
Installation Notes and Tips
Match the terminal style, wire gauge, and connector layout before installation. Verify the harness routing and locking tab engagement after splicing or replacement work. For best results, inspect adjacent wiring for corrosion, melted insulation, or terminal spread before reconnecting the circuit.
Quality Assurance
Built by Dorman as a replacement electrical connector for repair-focused applications, this part is designed to restore a reliable connection in the vehicle harness. It is engineered for fitment across the listed GM rear lamp wiring applications.
This part fits 98 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2008 | Cadillac | Escalade ESV | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2008 | Chevrolet | Avalanche | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2008 | Chevrolet | Silverado 1500 | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2008 | Chevrolet | Silverado 2500 HD | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2007 | Cadillac | Escalade ESV | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2007 | Chevrolet | Avalanche | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2007 | Chevrolet | Silverado 1500 | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2007 | Chevrolet | Silverado 1500 HD Classic | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2007 | Chevrolet | Silverado 2500 HD | N/A | Black; Rear Lamp Wiring Harness Connector; 7 Way w/Leads |
| 2007 | Hummer | H2 | N/A | Black; 7 Way w/Leads |
| 2005 | Cadillac | Escalade ESV | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Avalanche 1500 | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Avalanche 2500 | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Silverado 1500 | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Silverado 1500 HD | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Silverado 2500 HD | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Silverado 3500 | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Suburban 1500 | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Suburban 2500 | N/A | Black; 7 Way w/Leads |
| 2005 | Chevrolet | Tahoe | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Sierra 1500 | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Sierra 1500 HD | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Sierra 2500 HD | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Sierra 3500 | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Yukon | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Yukon XL 1500 | N/A | Black; 7 Way w/Leads |
| 2005 | GMC | Yukon XL 2500 | N/A | Black; 7 Way w/Leads |
| 2004 | Cadillac | Escalade ESV | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Avalanche 1500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Avalanche 2500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Silverado 1500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Silverado 2500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Silverado 2500 HD | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Silverado 3500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Suburban 1500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Suburban 2500 | N/A | Black; 7 Way w/Leads |
| 2004 | Chevrolet | Tahoe | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Sierra 1500 | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Sierra 2500 | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Sierra 2500 HD | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Sierra 3500 | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Yukon | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Yukon XL 1500 | N/A | Black; 7 Way w/Leads |
| 2004 | GMC | Yukon XL 2500 | N/A | Black; 7 Way w/Leads |
| 2003 | Cadillac | Escalade ESV | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Avalanche 1500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Avalanche 2500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Silverado 1500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Silverado 1500 HD | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Silverado 2500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Silverado 2500 HD | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Silverado 3500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Suburban 1500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Suburban 2500 | N/A | Black; 7 Way w/Leads |
| 2003 | Chevrolet | Tahoe | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Sierra 1500 | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Sierra 1500 HD | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Sierra 2500 | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Sierra 2500 HD | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Sierra 3500 | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Yukon | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Yukon XL 1500 | N/A | Black; 7 Way w/Leads |
| 2003 | GMC | Yukon XL 2500 | N/A | Black; 7 Way w/Leads |
| 2002 | Cadillac | Escalade EXT | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Avalanche 1500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Avalanche 2500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Silverado 1500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Silverado 1500 HD | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Silverado 2500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Silverado 2500 HD | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Silverado 3500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Suburban 1500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Suburban 2500 | N/A | Black; 7 Way w/Leads |
| 2002 | Chevrolet | Tahoe | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Sierra 1500 | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Sierra 1500 HD | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Sierra 2500 | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Sierra 2500 HD | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Sierra 3500 | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Yukon | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Yukon XL 1500 | N/A | Black; 7 Way w/Leads |
| 2002 | GMC | Yukon XL 2500 | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Silverado 1500 | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Silverado 1500 HD | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Silverado 2500 | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Silverado 2500 HD | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Silverado 3500 | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Suburban 1500 | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Suburban 2500 | N/A | Black; 7 Way w/Leads |
| 2001 | Chevrolet | Tahoe | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Sierra 1500 | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Sierra 1500 HD | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Sierra 2500 | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Sierra 2500 HD | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Sierra 3500 | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Yukon | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Yukon XL 1500 | N/A | Black; 7 Way w/Leads |
| 2001 | GMC | Yukon XL 2500 | N/A | Black; 7 Way w/Leads |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
1449153063391P2081EC739PT1392PT740S-1242
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.