Standard Ignition S3072 Nitrogen Oxide (NOx) Sensor Connector

NOx Sensor Connector for GM Diesel Applications

Standard Ignition S3072 is a nitrogen oxide (NOx) sensor connector built for direct service on select Chevrolet and GMC diesel trucks and vans. It is a 6-terminal, male connector with a square housing and a 430 mm (17 in.) harness length for repair work on the vehicle-side wiring.

Compatible With 2010-2016 Chevrolet Express 2500 and Express 3500, plus 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD. Also fits 2010-2016 GMC Savana 2500 and Savana 3500, and 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD.

Key Features

• Standard Ignition S3072 NOx sensor connector for electrical repair
• Male connector with square housing and 0-degree bend angle
• 6 female bullet terminals with 14 ga. wire
• 430 mm harness length for routing and splice repair
• Direct fit for select Chevrolet Express, Silverado, GMC Savana, and Sierra diesel applications

Detailed Description

This Standard Ignition S3072 connector is specified for NOx sensor circuit service where the original connector is damaged, heat affected, or no longer making reliable contact. The 6-terminal layout, 14-gauge wire, and square connector shape support a clean electrical repair on the harness side. With a 1 1/4 in. housing length and 17 in. harness lead, it provides the dimensions needed for service on select GM medium- and heavy-duty diesel platforms. This part cross-references OE-style service numbers such as 13578974 and EC3101 for the same application.

What It Helps Repair

• Broken or brittle NOx sensor connector housings
• Corroded or heat-damaged terminal connections
• Intermittent sensor signal caused by poor pin contact
• Harness-side wiring damage near the exhaust aftertreatment system
• Diagnostic trouble codes related to NOx sensor circuit faults

Installation Notes and Tips

Verify connector shape, terminal count, and harness length before installation. Match the existing wiring layout and confirm the vehicle application against the listed Chevrolet Express, Silverado, GMC Savana, and Sierra fitment. Because this is an electrical connector repair part, proper wire splicing, sealing, and terminal seating are important for stable sensor communication.

Quality Assurance

Standard Ignition supplies electrical service parts for OE-style repair applications. S3072 is built to match the listed connector configuration and fitment requirements for the specified GM diesel vehicles.