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15326856 / 15326861 Automotive 14-Pin Waterproof Urea Pump Connector — Delphi / Chevrolet Wiring Harness Socket
15326856 / 15326861 Automotive 14-Pin Waterproof Urea Pump Connector Delphi / Chevrolet Wiring Harness Socket
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15326856 / 15326861 Automotive 14-Pin Waterproof Urea Pump Connector — Delphi / Chevrolet
The 15326856 and 15326861 are 14-pin waterproof automotive connectors for urea (DEF — Diesel Exhaust Fluid) pump assembly wiring harness applications on Delphi-harness Chevrolet and GM diesel vehicles. The urea pump is a critical component of the SCR (Selective Catalytic Reduction) emissions system, which injects DEF into the exhaust stream to reduce NOx emissions. The sealed 14-pin connector provides moisture and chemical resistance for the urea pump wiring in the harsh underbody environment.
Key Specifications
| Parameter | Value |
|---|---|
| OEM Part Numbers | 15326856 / 15326861 |
| Pin Count | 14-pin |
| Application | Urea (DEF) pump assembly connector |
| Sealing | Waterproof (sealed) |
| Housing Material | PA66 glass-filled nylon |
| Terminal Material | Tin-plated copper alloy |
| Operating Temperature | -40°C to +125°C |
| Compatible Platforms | Chevrolet / GM diesel (Delphi harness) |
| Compliance | RoHS |
DEF/SCR System Connector Requirements
- Chemical resistance — DEF (32.5% urea solution) is corrosive to standard copper terminals; the sealed connector housing and tin-plated terminals provide protection against DEF contamination
- Underbody sealed design — the urea pump is mounted in the underbody DEF tank assembly, exposed to road spray, salt, and temperature extremes; IP67 sealing is essential
- 14-pin for complete pump interface — accommodates pump motor power/ground, heating element, temperature sensor, level sensor, pressure sensor, and quality sensor circuits
- Delphi / GM OEM standard — manufactured to GM mating dimensions for direct replacement on Chevrolet Silverado, Cruze diesel, and related GM diesel platforms
Typical Applications
- Chevrolet / GM diesel urea pump connector repair
- SCR system DEF pump wiring harness replacement
- AdBlue pump connector repair on GM platforms
- Emissions system wiring harness repair
Frequently Asked Questions
Q: What causes urea pump connector failure?
DEF (urea solution) crystallizes when it dries, and DEF contamination of the connector terminals causes rapid corrosion and increased contact resistance. This triggers SCR system fault codes (P20EE, P207F, etc.) and can disable the vehicle in emissions-compliant markets. Inspect the connector for white crystalline deposits (DEF residue) and replace if contaminated.
Q: Do I need to replace the wire seals when replacing this connector?
Yes — always install new wire seals when replacing a waterproof connector in a DEF/SCR application. DEF contamination degrades rubber seals over time; reusing old seals risks continued DEF ingress and repeat terminal failure.
