Standard Ignition NS-228 Clutch Starter Safety Switch

Clutch Starter Safety Switch for Chevrolet and GMC

Standard Ignition NS-228 is a clutch starter safety switch built for vehicles that require the clutch pedal to be depressed before the starter circuit engages. It uses a white plastic finish, a male blade terminal design, and a no-connector configuration for direct electrical service work on supported applications.

Fits 1975-1979 Chevrolet P10, N/A. Fits 1975-1979 Chevrolet P20, N/A. Fits 1975-1979 Chevrolet P30, N/A. Fits 1991-1995 Chevrolet P30, N/A. Fits 1991-1995 GMC P3500, N/A.

Key Features

• Standard Ignition NS-228 clutch starter safety switch
• White plastic finish
• No connector design
• Male blade terminals with 2 terminal positions
• Copper alloy conductors for strong electrical conductivity and low resistive loss
• 100% tested for mechanical and electrical switching performance

Detailed Description

Standard Ignition NS-228 is engineered for clutch-start circuits where the switch must confirm pedal position before starter engagement. The robust housing and copper alloy conductor construction support consistent electrical transfer, while the tested switching performance helps maintain dependable operation in service environments. This part is a direct-fit electrical service component for Chevrolet P10, P20, and P30 models, as well as GMC P3500 applications listed in the fitment data. This part cross-references Dorman (e.g., 1S5121, DR4094) for the same application.

Common Issues This Part Can Address

• Starter will not engage when the clutch pedal is pressed
• Intermittent no-crank condition at the clutch interlock circuit
• Worn or unreliable clutch pedal switch operation
• Electrical continuity problems at the starter safety switch
• Service replacement for aging clutch-start switch hardware

Installation Notes and Tips

Verify the vehicle uses a clutch starter safety switch with a male blade terminal layout and no connector before installation. Confirm the switch location and terminal orientation against the original part on the vehicle. Inspect the harness terminals for corrosion, looseness, or heat damage before connecting the replacement switch.

Quality Assurance

Standard Ignition builds this switch with service-grade materials and tests each unit for mechanical and electrical switching performance. Copper alloy conductors are used to support stable conductivity in clutch-start applications.