Delphi Aptiv 15366021 White Silicone Wire Seal

The Component: Genuine Aptiv (formerly Delphi) 15366021 automotive single wire cavity cable seal. GT 150 and GT 280 Series compatible / High-grade liquid silicone rubber (LSR) / White color-coded sizing / Multi-ribbed environmental isolation barrier / Component Alias Code: 15366021 / Global Order Reference: 15366021.

Applications & Fitment: Engineered as a factory original equipment (OE) individual wire seal designed to prevent fluid, dust, and atmospheric moisture intrusion from entering terminal cavities. This high-retention white silicone grommet is a standard wiring harness staple across domestic, European, and industrial transport platforms—heavily integrated within General Motors (GM) powertrain harnesses and harsh-environment marine wiring looms. It is specifically designed to slide over thin-wall automotive wiring insulation before crimping, seating perfectly inside the rear cavity paths of GT 150 sealed female housings (such as the 5-way 15326822 / 13519051 plug) and select GT 280 sealed connectors. It forms an airtight moisture barrier that protects low-voltage sensor tracks and logic-level lines from continuous exposure to engine oils, road spray, and pressurized steam washing. Highly vulnerable to tearing, slicing, or puncture if field service technicians try to aggressively push the seal down the wire using sharp metal drivers or un-profiled picks rather than a dedicated smooth-tip insertion tool.

Technical Attributes:

- Manufacturer Part Number: 15366021 (Brand: Aptiv / Delphi Connection Systems / Genuine Factory Automotive Class)

- Product Series Taxonomy: GT Series Interconnect System (GT 150 & GT 280 Sealed Family compatibility)

- Component Typology: Individual Single Wire Cavity Cable Seal (SWS)

- Base Structural Compound: High-perfromance Liquid Silicone Rubber (LSR) for elite elasticity and chemical repellency

- Color Profile: Factory Solid White (Color-coded for clear visual identification of smaller conductor sizing tiers)

- Permissible Cable Insulation Outer Diameter: Precision optimized to seal wire jackets ranging from 1.20mm minimum up to 1.85mm maximum total outer diameter

- Target Wire Cross-Section Fitment: Ideally matched to light-gauge automotive thin-wall wiring configurations ranging from 0.35mm² to 0.50mm² (Comfortably seals standard 22 AWG to 20 AWG lines)

- Environmental Performance: Provides robust dustproof and waterproof security meeting severe automotive under-hood test constraints

- Fluid Compatibility: Highly resistant to deterioration from synthetic engine oils, coolant blends, brake fluid, transmission oils, and diesel fuels

- Operational Thermal Window: Severe-duty engine bay envelope certified to maintain structural elasticity from -40°C up to +125°C

- Associated Compatible Terminals: Accommodates GT 150 and GT 280 series male blades or female receptacle socket crimp pins, matching perfectly with small-wire terminal part number 12191818

- Associated Housing Core Size: Fits standard 150-size plug cavity entries with a matching rear seal internal bore configuration

- Alternative Larger Variant: For medium-gauge conductors (18-16 AWG / 1.86mm to 2.40mm outer insulation), refer to alternate blue color-coded factory seal part number 15366060

- Commercial Access: Available as convenient trade repair pack bundles or loose bulk commercial bags for high-volume trade wiring benches. Tiered B2B wholesale trade volume pricing breaks apply instantly inside your basket for independent garages, loom remanufacturers, and trade auto-electrical stockists.